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Type of variable star
A slow irregular variable (ascribed the GCVS types L, LB and LC) is a variable star that exhibit no or very poorly defined periodicity in their slowly
Slow_irregular_variable
Type of variable star
An irregular variable is a type of variable star in which variations in brightness show no regular periodicity. There are two main sub-types of irregular
Irregular_variable
Star whose brightness fluctuates, as seen from Earth
star Irregular variable List of transiting exoplanets List of variable stars Alexeev, Boris V. (2017-01-01). "Chapter 7 - Nonlocal Theory of Variable Stars"
Variable_star
Topics referred to by the same term
refer to any of the following: Irregular galaxy Irregular moon Irregular variable, a kind of star Irregular inflection, the formation of derived forms such
Irregular
Type of variable star
slow irregular variable by the GCVS, but reported to be of SRb type by later research. These four are all class M giants, although some SRb variables are
Semiregular_variable_star
Binary star in the constellation Scorpius
Distinctly reddish when viewed with the naked eye, Antares is a slow irregular variable star that ranges in brightness from an apparent visual magnitude of
Antares
Topics referred to by the same term
the Netherlands controlled by the Agnelli family EXor, a class of irregular variable stars XOR (disambiguation) This disambiguation page lists articles
Exor
Fluctuations in stellar radius
RV Tauri and semiregular variables) to the near absence of repetitiveness in the irregular variables. The W Virginis variables are at the interface; the
Stellar_pulsation
Catalogue of Variable Stars (GCVS4.2)". Retrieved 3 April 2012. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS
List_of_stars_in_Boötes
Catalogue of Variable Stars (GCVS4.2)". Retrieved 10 April 2012. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS
List_of_stars_in_Cassiopeia
Star in the constellation Cepheus
solar radii, making it one of the largest known stars. It is a slow irregular variable with an apparent magnitude that ranges between 10.55 - 11.4. "All-Sky
V355_Cephei
Evolved K-type star in the constellation of Vela
giving it the cool orange hue of a K-type star. It is an Lc-type, slow irregular variable star with its brightness varying between apparent magnitudes +2.14
Lambda_Velorum
Star in the constellation Cepheus
star located within the northern constellation of Cepheus. It is an irregular variable located over 13,000 light-years away from the Sun, and is considered
V354_Cephei
Star in the constellation Vulpecula
supergiant or hypergiant in the constellation Vulpecula. It is an irregular variable star with an apparent magnitude varying between 9.13 and 9.61, which
NR_Vulpeculae
Very compact quasi-stellar radio source
powerful distant galaxies, but as irregular variable stars in our own galaxy. These blazars, like genuine irregular variable stars, changed in brightness on
Blazar
Star in the constellation Carina
Cygni variable. A period of 556 days was suggested, but it is not entirely consistent. It is now generally treated as a semiregular or irregular supergiant
V382_Carinae
Star in the northern constellation of Pegasus
it the orange-hued glow of a K-type star. Epsilon Pegasi is a slow irregular variable star that usually has a brightness between magnitudes 2.37 and 2.45
Epsilon_Pegasi
Star in the constellation Canis Major
classed as a type LC slow irregular variable star in the American Association of Variable Star Observers (AAVSO) Variable Star Index. Other periods of
VY_Canis_Majoris
Triple star system in the constellation Scutum
but is now though to be a detached eclipsing binary with additional irregular pulsations of the cool supergiant. Another star system similar to FR Scuti
FR_Scuti
Star in the constellation Gemini
magnitudes by extinction from intervening gas and dust. It is a slow irregular variable of type LB. Its brightness varies between magnitude +2.75 and +3.02
Mu_Geminorum
Star in the constellation Cygnus
red supergiant or hypergiant in the constellation Cygnus. It is an irregular variable star with a maximum brightness of magnitude 8.4 and a minimum of magnitude
BI_Cygni
Star in the constellation Monoceros
standard for O7 by which other stars are classified. It is also an irregular variable star with a range of less than a tenth of a magnitude. The orbital
S_Monocerotis
Brightest star in Taurus
030 mas. Aldebaran is a slightly variable star, assigned to the slow irregular type LB. The General Catalogue of Variable Stars indicates variation between
Aldebaran
Star in the constellation Crux
DU Crucis is a red supergiant and slow irregular variable star in the constellation Crux and a prominent member of the Jewel Box (NGC 4755) open cluster
DU_Crucis
52497 33927 07h 02m 24.78s +24° 12′ 55.6″ 5.20 −3.33 1655 G5II slow irregular variable, Vmax = 5.18m, Vmin = 5.20m 63 Gem 63 58728 36238 07h 27m 44.39s +21° 26′ 44
List_of_stars_in_Gemini
Red Supergiant star in the constellation Perseus
constellation of Perseus in the northern celestial hemisphere. Classified as a variable star of spectral type M1-Iab-Ib, it exhibits mild brightness variations
PR_Persei
Star in the constellation of Cepheus
the star is a variable star. That same year it was given its variable star designation, ST Cephei. Listed as an LC irregular variable star, the brightness
ST_Cephei
Active galaxy in the constellation Lacerta
but was originally thought to be an irregular variable star in the Milky Way galaxy and so was given a variable star designation. In 1968, the "star"
BL_Lacertae
Star in the constellation Auriga
supergiant star with a stellar classification of K5-M1Iab-Ib. It is a slow irregular variable of the LC type, with its brightness varying in magnitude by 0.44.
Psi1_Aurigae
Emission and reflection nebula in the constellation Auriga
constellation Auriga north of the celestial equator, surrounding the bluish, irregular variable star AE Aurigae. It shines at magnitude +6.0. Its celestial coordinates
IC_405
Archived from the original on 2012-02-27. Retrieved 2010-07-16. "AAVSO Website". American Association of Variable Star Observers. Retrieved 9 March 2014.
List_of_stars_in_Monoceros
Slow irregular variable; Corona Australis
one lasting 5.37 days and the other lasting 71.1 days. It is a slow irregular variable of subtype Lb that fluctuates between 5.45 and 5.51 in the Hipparcos
V718_Coronae_Australis
Cool luminous pulsating variable star
variables. At its broadest, LPVs include Mira, semiregular, slow irregular variables, and OGLE small amplitude red giants (OSARGs), including both giant
Long-period_variable_star
Star in the constellation Aquarius
formally listed as a variable star in 1973, and given the variable star designation EN Aquarii. It is classified as an irregular variable, although detailed
3_Aquarii
Star in the constellation Boötes
measurements, it is about 540 light-years distant. This is a slow irregular variable with an apparent magnitude varying between 4.98 and 5.33. The variability
HD_123657
Globular cluster in the constellation Sagitta
light years away from Earth and spans 27 light-years (8 pc). The irregular variable star Z Sagittae is a member. M71 was for many decades thought (until
Messier_71
Catalogue of Variable Stars (GCVS4.2)". Retrieved 2012-07-18. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS database
List_of_stars_in_Cetus
Star in the constellation of Sagittarius
star as a variable star in his Uranometria Argentina. It was given its variable star designation in 1973. It is a slow irregular variable with multiple
62_Sagittarii
Red supergiant star in the constellation Gemini
days. It has been given the sub-classification of Lc, which means "Irregular variable supergiants of late spectral types having amplitudes of about 1 mag
6_Geminorum
Star in the constellation Cetus
7 Ceti. It was given its variable star designation in 1973. Samus et al. (2017) has it classed as a slow irregular variable of type LB:, and ranges in
7_Ceti
Star in the constellation Aquarius
effective strength measured at 220±60 Gauss. It is classified as slow irregular variable and pulsation periods of 24.5, 32.0, and 49.5 days have been identified
Lambda_Aquarii
Type of cool giant star
long period variable stars. The extrinsic S stars are less luminous and longer-lived, often smaller-amplitude semiregular or irregular variables. S stars
S-type_star
Variable star in the constellation Canis Major
confirmed in 1963, and it was formally catalogued as a variable star. It is classified as an irregular variable star and its brightness varies from magnitude +3
Sigma_Canis_Majoris
Star in the constellation Norma
39 ly). HD 143183 is catalogued with the variable star designation V558 Normae as its brightness varies irregularly between apparent magnitudes 7.3 and 8
HD_143183
Star in the constellation Andromeda
identified as a long-period variable in 1999 from analysis of Hipparcos photometry. It was classified as a slow irregular variable, but analysis of its light
V385_Andromedae
Catalogue of Variable Stars (GCVS4.2)". Retrieved 2012-04-08. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS database
List_of_stars_in_Carina
Star in the constellation Sagittarius
the helium at its core. This star is classified as an oxygen-rich irregular variable, as it undergoes small magnitude fluctuations between +3.08 and 3
Eta_Sagittarii
Binary star in the constellation Carina
Apparent magnitude (H) 3.432±0.208 Apparent magnitude (K) 2.970±0.236 Variable type LC Primary Evolutionary stage Post-red supergiant Spectral type A7Ie–F0:I
AFGL_4106
Carbon star in the constellation Antlia
star, with its variable star designation U Antiliae, in her 1907 Second Catalogue of Variable Stars. U Antliae is an irregular variable star with an apparent
U_Antliae
Constellation in the southern celestial hemisphere
yellow hypergiant, one of the rarest types of stars. It is a slow irregular variable, with a minimum magnitude of 4.05 and a maximum magnitude of 3.77
Carina_(constellation)
"Identification of a Constellation from a Position". Retrieved 2006-12-26. "AAVSO Website". American Association of Variable Star Observers. Retrieved 9 March 2014.
List_of_stars_in_Sagitta
Carbon star visible to the naked eye in the constellation Pisces
Piscium varies between +4.9 and +5.5 and it is classified as a slow irregular variable. Photometry has shown some periodicity in the brightness of 224 days
TX_Piscium
Star in the constellation of Carina
K-type bright giant star in the constellation of Carina. It is an irregular variable and has an apparent visual magnitude which varies between 3.36 and
V337_Carinae
Star in the constellation Lacerta
Catalogue of Variable Stars as a slow irregular variable, it has been considered to be either a semiregular variable or long secondary period variable. There
V424_Lacertae
Star in the constellation Cassiopeia
Cassiopeiae was reported as being variable by Williamina Fleming and published posthumously in 1911. It is a slow irregular variable star with a possible period
TZ_Cassiopeiae
Red giant star in the constellation Lynx
It has been classified as a possible slow irregular variable, after being found to be slightly variable in 1969 by Olin J. Eggen. Its changes in brightness
1_Lyncis
Star in the constellation Boötes
around 210 times the Sun's radius. EK Boo is classified as a slow irregular variable that ranges in luminosity with an amplitude of 0.38 in magnitude and
HD_130144
Catalogue of Variable Stars (GCVS4.2)". Retrieved 2012-07-12. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS database
List_of_stars_in_Cepheus
42973 29919 06h 17m 54.83s +61° 30′ 55.1″ 4.95 −1.34 590 M3III slow irregular variable, ΔV = 0.11m HD 56169 56169 35384 07h 18m 31.98s +49° 27′ 53.1″ 5.00
List_of_stars_in_Lynx
Star in the constellation Octans
listed in the General Catalogue of Variable Stars as a possible slow irregular variable. It was classified as a variable star in 1977, on the basis of a
BQ_Octantis
Star in the constellation Cygnus
KY Cygni is a variable red supergiant or hypergiant of spectral class M3Ia located in the constellation Cygnus. It is approximately 4,700 light-years away
KY_Cygni
Star in the constellation Boötes
has swollen to 44 times the radius of the Sun. It is a suspected irregular variable that ranges in photographic magnitude from 6.1 down to 6.6. 9 Boötis
9_Boötis
Star in the constellation Cygnus
detected from this system in 1985/86. The supergiant primary is a slow irregular variable with an amplitude of about 0.1 magnitudes. Its angular diameter has
47_Cygni
Star in the constellation Carina
a variable star when the Hipparcos data was analyzed, and for that reason it was given a variable star designation in 1999. It is a slow irregular variable
V520_Carinae
Star in the constellation Perseus
NGC 869, one of the Perseus Double Cluster open clusters. It is an irregular variable star. At a magnitude of about 6.6, V520 Persei is the brightest member
V520_Persei
Star in the constellation Carina
Jump Cannon's 1907 work, Second Catalogue of Variable Stars. It is catalogued as an irregular variable star, but a number of possible pulsation periods
RT_Carinae
Star in the constellation Carina
BO Carinae, also known as HD 93420, is an irregular variable star in the constellation Carina. BO Car has a maximum apparent magnitude of +7.18. Its distance
BO_Carinae
Star in the constellation Boötes
cooled and expanded off the main sequence. It is classified as a slow irregular variable of the Lb type, and its brightness has been observed to vary from
13_Boötis
Catalogue of Variable Stars (GCVS4.2)". Retrieved 3 April 2012. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS
List of stars in Camelopardalis
List_of_stars_in_Camelopardalis
Star in the constellation Aquila
20 Aquilae, abbreviated 20 Aql, is an irregular variable star in the equatorial constellation of Aquila. 20 Aquilae is its Flamsteed designation. It ranges
20_Aquilae
Constellation in the southern celestial hemisphere
light-years from Earth, and is another optical double. Xi Telescopii is an irregular variable star that ranges between magnitudes 4.89 and 4.94. Located 1079 light-years
Telescopium
Catalogue of Variable Stars (GCVS4.2)". Retrieved 28 March 2012. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS
List_of_stars_in_Aquarius
Catalogue of Variable Stars (GCVS4.2)". Retrieved 4 April 2012. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS
List_of_stars_in_Canis_Major
Star in the constellation Puppis
the orange hue of a K-type star. It shows the behavior of a slow irregular variable. In addition to its binary components, Sigma Puppis has a more distant
Sigma_Puppis
Star in the constellation Draco
giant star with a stellar classification of M3.5 III. It is a periodic variable with a frequency of 11.98912 cycles per day and an amplitude of 0.0254
10_Draconis
Type of eruptive variable star
An R Coronae Borealis variable (abbreviated RCB, R CrB) is an eruptive variable star that varies in luminosity in two modes, one low amplitude pulsation
R_Coronae_Borealis_variable
Triple star in the constellation Puppis
photosphere at an effective temperature of 3,660 K. It shows small amplitude irregular pulsations, and also some variation associated with the orbital motion
KQ_Puppis
Star in the constellation Carina
discovery that the star's brightness varies, in 1970. It was given its variable star designation, V341 Carinae, in 1975. HD 65750 is located about 900
HD_65750
Variable star in the constellation Eridanus
abbreviated Gamma Eri, γ Eri), formally named Zaurak /ˈzɔːræk/, is a variable star in the constellation of Eridanus. It is visible to the naked eye with
Gamma_Eridani
Star in the constellation Carina
its variable star designation in 1999. It is classified as a slow irregular variable whose prototype is TZ Cassiopeiae. List of largest known stars Vallenari
V528_Carinae
Binary star in the constellation Phoenix
Phoenicis is listed in the General Catalogue of Variable Stars as a possible slow irregular variable with a range from 3.39 to 3.49, the same as reported
Gamma_Phoenicis
Constellation in the northern celestial hemisphere
the Sun and is around 690 light-years distant from Earth. It is an irregular variable, its apparent magnitude varying between 2.37 and 2.45. Lying near
Pegasus_(constellation)
Star in the constellation Puppis
NS Puppis (NS Pup) is an irregular variable star in the constellation Puppis. Its apparent magnitude varies between 4.4 and 4.5. NS Puppis is a naked eye
NS_Puppis
Red giant star in the constellation Cancer
discovery that Mu1 Cancri is a variable star. It was given its variable star designation in 1972. It is a slow irregular variable with thermal pulsation periods
Mu1_Cancri
Catalogue of Variable Stars (GCVS4.2)". Retrieved 2012-04-03. Samus, N. N.; Durlevich, O. V.; et al. (2012). "General Catalog of Variable Stars (GCVS database
List_of_stars_in_Auriga
Variable star in the Camelopardalis constellation
star designation, BE Camelopardalis, in 1977. It is classified as an irregular variable of subtype Lc and its brightness varies from magnitude +4.35 down
BE_Camelopardalis
Open star cluster in the constellation Cassiopeia
located near the open cluster NGC 637, and the bright magnitude +2.2 irregular variable star Gamma Cassiopeiae. The cluster is 7 arcmins across. It was discovered
NGC_559
Star in the constellation Crux
pulsation periods of varying amplitude accounting for the apparently irregular brightness changes. WR 46 has been suspected to be a binary system with
WR_46
Star in the constellation Aquarius
LP Aquarii is a pulsating variable star in the constellation of Aquarius that varies between magnitudes 6.30 and 6.64. The position of the star near the
LP_Aquarii
Binary star system in the constellation Eridanus
giant branch with a stellar classification of M3/4 III. It is a slow irregular variable star of type Lb, undergoing changes in magnitude over the range 3
Tau4_Eridani
Star in the constellation Camelopardalis
star, then called HR 1105, is a variable star, based on observations made at Washburn Observatory. It was given its variable star designation, BD Camelopardalis
BD_Camelopardalis
Variable star in the constellation Equuleus
U Equulei (U Equ / IRAS 20547+0247) is a variable star in the constellation Equuleus with an apparent magnitude of +14.50 in the B band. It lies at an
U_Equulei
Star in the constellation Microscopium
tentatively classified as an irregular variable of subtype LC, suggesting this is a supergiant star. It is a pulsating variable with multiple periods discovered
AV_Microscopii
Variable star in the constellation Canis Major
is an orange K-type supergiant of spectral type K2.5 Iab and is an irregular variable star, varying between apparent magnitudes 3.78 and 3.99. A cool star
Omicron1_Canis_Majoris
Star in the constellation Lacerta
constellation Lacerta. Its apparent magnitude is 4.36. 5 Lacertae is a slow irregular variable star with a small amplitude. Photometry from the Hipparcos satellite
5_Lacertae
Star in the constellation Hercules
French astronomer Paul Muller then classified Theta Herculis as an irregular variable with a range of magnitudes between 3.7 and 4.1 and a periodicity of
Theta_Herculis
Binary star in the constellation Dorado
variability has since been observed to transition from semi-regular to irregular circa 2014. WOH G64 A was discovered to be a prominent source of OH, H
WOH_G64
Single, variable M-type giant star in the constellation Leo
spectral standard star for that class. The star is classified as an irregular variable of type LC, ranging from Hipparcos magnitude 4.56 down to 4.64. It
72_Leonis
Star in the constellation Centaurus
classification of M3/4III. Samus et al. (2017) classify this as a slow irregular variable of sub-type Lb and its brightness varies from magnitude +5.52 down
V763_Centauri
Star in the constellation Auriga
PU Aurigae is an irregular variable star located in the constellation Auriga. A red giant, it varies by 0.1 magnitude around magnitude 5.64, so it is faintly
PU_Aurigae
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IRREGULAR VARIABLE
IRREGULAR VARIABLE
Boy/Male
Gujarati, Haryanvi, Hindu, Indian, Kannada, Marathi, Telugu
Regular; Ethical; Good in Nature
Surname or Lastname
English
English : occupational name for a maker or seller of leggings, from an agent derivative of Middle English hose (Old English hosa). Hose was the regular term for garments worn on the legs until the 18th century.
Surname or Lastname
English, of Welsh origin
English, of Welsh origin : variant of Bevan, with the addition of the regular English patronymic suffix -s.
Surname or Lastname
English (Bedfordshire)
English (Bedfordshire) : habitational name from an unidentified place. In Tudor records, the surname is generally spelled Logsden or Loggesden. It may be a variant of Loxton, name of a place in Somerset, or possibly an irregularly altered form of Roxton, name of a place in Bedfordshire (see Ruxton).A William Logsden is recorded in Somerset Co., MD, tax rolls in the late 17th century.
Boy/Male
Shakespearean
King Henry IV, Part 1 and 2' An irregular humorist.
Surname or Lastname
English, North German, Dutch, Frisian, and Danish
English, North German, Dutch, Frisian, and Danish : from a Germanic personal name, Boio or Bogo, of uncertain origin. It may represent a variant of Bothe, with the regular Low German loss of the dental between vowels, but a cognate name appears to have existed in Old English (see Boyce), where this feature does not occur. Boje is still in use as a personal name in Friesland.Dutch : nickname from Middle Dutch boy(e) ‘boy’, ‘lad’.
Surname or Lastname
English (Devon)
English (Devon) : unexplained. Possibly an irregular variant of Birchall.
Surname or Lastname
English
English : metonymic occupational name for a keeper of a lodging house, from late Old English herebeorg ‘shelter’, ‘lodging’ (from here ‘army’ + beorg ‘shelter’). (The change of -er- to -ar- is a regular phonetic process in Old French and Middle English.)Variant of French Arbour.A Harbour or Arbour, from Normandy, France, is documented in Quebec City in 1671.
Boy/Male
Shakespearean
King Henry IV, Part 2' An irregular humorist. In Henry V, Pistol is a soldier in the King's army....
Boy/Male
Hindu, Indian, Traditional
Conduct; Regular Performance of Worship
Surname or Lastname
English, of Welsh origin
English, of Welsh origin : variant of Bowen, with the addition of the regular English patronymic suffix -s.Altered spelling of Dutch Bouwens, a variant of Bauwens.
Surname or Lastname
North German
North German : variant of Asch.English : variant spelling of Ash (asche was the regular Middle English spelling of this word).
Girl/Female
Arabic, Muslim
Pilgrimage to Makkah Other than Regular Hajj Days
Surname or Lastname
English
English : nickname probably for a tenant whose feudal obligations included a regular payment in cash or kind (for example bread or salt) of a halfpenny.
Boy/Male
Hindu, Indian, Tamil
Regular Winner
Boy/Male
Shakespearean
King Henry IV, Part 1 and 2' Edward Poins, an irregular humorist.
Surname or Lastname
English (chiefly West Midlands)
English (chiefly West Midlands) : habitational name from any of various places called Parton; most are named with Old English peretūn ‘pear orchard’ (a compound of pere ‘pear’ + tūn ‘enclosure’, with later change of -er- to -ar-, a regular phonetic development in Middle English). There are examples in Gloucestershire, two in Cumbria, and one in Kircudbrightshire, Scotland.
Boy/Male
Shakespearean
King Henry IV, Part 1 and 2' Edward Poins, an irregular humorist. 'Henry VI, Part 2' Son of...
Surname or Lastname
English (mainly South Wales and southwestern England)
English (mainly South Wales and southwestern England) : from the medieval personal name Harry, which was the usual vernacular form of Henry, with assimilation of the consonantal cluster and regular Middle English change of -er- to -ar-.French : from the Germanic personal name Hariric, composed of the elements hari, heri ‘army’ + rīc ‘power(ful)’.
Surname or Lastname
English
English : topographic name for someone who lived on a curved or irregularly shaped piece of land, from Old English wÅh ‘curved’, ‘crooked’ + land ‘land’, ‘estate’, or a habitational name from Woolland in Dorset, named from an Old English winn, wynn ‘meadow’, ‘pasture’ + land ‘land’, ‘estate’.
IRREGULAR VARIABLE
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