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Astronomical coordinate analogous to latitude
In astronomy, declination (abbreviated dec; symbol δ) is the angular distance from the celestial equator on the celestial sphere; when paired with right
Declination
Angle on the horizontal plane between magnetic north and true north
Magnetic declination (also called magnetic variation) is the angle between magnetic north and true north at a particular location on the Earth's surface
Magnetic_declination
Topics referred to by the same term
Look up declination in Wiktionary, the free dictionary. Declination is a noun form of the verb decline and may refer to: Declination, coordinate used in
Declination_(disambiguation)
Calculating the Sun's location in the sky at a given time and place
that the solar declination would decrease linearly with time. Eventually, the Sun would be directly above the South Pole, with a declination of −90°; then
Position_of_the_Sun
Equation to derive time of sunset and sunrise
equation can be used to derive the time of sunrise or sunset for any solar declination and latitude in terms of local solar time when sunrise and sunset actually
Sunrise_equation
Moon stops moving north or south
celestial equator (measured as an angle expressed in degrees called declination of a celestial coordinate system, analogous to latitude). The Moon comes
Lunar_standstill
Instrument used for navigation and orientation
magnetic north, called magnetic declination can vary widely with geographic location. The local magnetic declination is given on most maps, to allow the
Compass
Mounting system for camera or telescope
ascension) is paired with a second perpendicular axis of motion (known as the declination). The equatorial axis of the mount is often equipped with a motorized
Equatorial_mount
Inflection in the Russian language
In Russian grammar, the system of declension is elaborate and complex. Nouns, pronouns, adjectives, demonstratives, most numerals and other particles are
Russian_declension
Large trans-Neptunian object
its brightness, it had long evaded detection due to a notably southern declination and being located near the crowded Galactic plane. Little is known about
2026_ED138
Line between the poles with the same longitude
latitude with the formula. Latitude = (90° – noon altitude + declination) The declination of major stars are their angles north and south from the celestial
Meridian_(geography)
Earth's magnetic pole in the Northern Hemisphere
north is called the magnetic declination. Most map coordinate systems are based on true north, and magnetic declination is often shown on map legends
North_magnetic_pole
Rhetorical technique to create bias
In rhetoric, emotive or emotional conjugation (also known as Russell's conjugation) is a rhetorical technique used to create an intrinsic bias towards
Emotive_conjugation
Segment of speech that occurs with a single prosodic contour
of tempo; this larger unit is termed a declination unit (DU). At the boundaries (pauses) between declination units, the pitch and tempo reset; for this
Prosodic_unit
One of the four cardinal directions
difference between it and true north is called the magnetic declination (or simply the declination where the context is clear). For many purposes and physical
North
Celestial coordinate system used to specify the positions of celestial objects
south. For example, the north celestial pole has a declination of +90°. The origin for declination is the celestial equator, which is the projection of
Equatorial_coordinate_system
Imaginary point directly above a particular location, on the imaginary celestial sphere
(also "star on top", "overhead star", "latitude star") are stars whose declination equals the latitude of the observers location, and hence at some time
Zenith
Study and interpretation of the signatures of the Earth's magnetic field
Pole and the local secular variation to yield a magnetic declination. The magnetic declination at any given time can be frozen into a clay formation that
Archaeomagnetic_dating
Diagrammatic representation of Sun's position over a period of time
("sun fast") vs. declination of the Sun. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of
Analemma
Atmospheric illumination by the Sun below the horizon
at latitudes less than 48°50' North or South, because then the Sun's declination is less than 23°10' from the Equator; In February or August, astronomical
Twilight
Astronomical instrument for timing of the passage of stars
all times. Revolving the telescope about its axis moves it directly in declination, and objects move through its field of view in right ascension. All objects
Meridian_circle
List of constellations by area
boundaries along vertical and horizontal lines of right ascension and declination; however, he did so for the epoch B1875.0, which means that due to precession
IAU designated constellations by solid angle
IAU_designated_constellations_by_solid_angle
Astronomical equivalent of longitude
(hour circle of the) point in question above the Earth. When paired with declination, these astronomical coordinates specify the location of a point on the
Right_ascension
Part of celestial coordinate system
circle through a given object and the two celestial poles. Together with declination and distance (from the planet's centre of mass), it determines the location
Hour_circle
and span thirty-eight constellations of the celestial sphere from the declination of −70° to +89°. Many of the selected stars were named in antiquity by
List_of_stars_for_navigation
Daily appearance and disappearance of the Moon at the Earth's horizon
below it, respectively. The exact times depend on the lunar phase and declination, as well as the observer's location. As viewed from outside the polar
Moonrise_and_moonset
Class of star chart
centered on one of the celestial poles (polar), while circles of equal declination (for instance 60°, 30°, 0° (the celestial equator), −30°, and −60°) lie
Planisphere
History of the study of Earth's magnetic field
(north, east, and down) or spherical (declination, inclination, and intensity). In the latter system, the declination (the deviation from true north, a horizontal
History_of_geomagnetism
Visible star that is nearly aligned with Earth's axis of rotation
declination of +89°32'23", which translates to 1657" (or 0.4603°) from the celestial north pole, in February 2102. Its maximum apparent declination (taking
Pole_star
Passage of an astronomical body across the meridian
culmination is equal to 90 minus the observer's latitude (L) plus the object's declination (δ): A = 90° − L + δ. This equation is the basis for the meridian altitude
Culmination
Intersection of Moon's orbit with Earth's ecliptic
This is called major lunar standstill. Around this time, the Moon's declination will vary from −28°36′ to +28°36′. Conversely, 9.3 years later, the angle
Lunar_node
Astronomical catalogue
Array. It was published in two parts, in 1965 (for declinations +20 to +40) and 1967 (declinations −7 to + 20 and +40 to +80), by the Radio Astronomy
Fourth Cambridge Survey of Radio Sources
Fourth_Cambridge_Survey_of_Radio_Sources
Early astronomical instrument
instrument consists of three rings, representing the celestial equator, declination, and the meridian. It can be used as a sun dial to tell time, if the
Astronomical_rings
Emission nebula in the constellation Perseus
transits in the zenith in central California as the latitude matches the declination of the object. NGC 1499 is almost 2.5° long on the sky and, because of
California_Nebula
Time-telling device
at a positive declination in spring and summer, and at a negative declination in autumn and winter, and having exactly zero declination (i.e., being on
Sundial
Celestial coordinate system
east or true west when its declination is of the same name as the ship's latitude and less than the latter. When the declination of the body is of the same
Prime_vertical
White dwarf star in the constellation Draco
that it is a white dwarf located at a right ascension of 13h 30m and a declination of +64° 35′. It is sometimes referred to by its Sloan Digital Sky Survey
WD_J1330+6435
Swiss astronomer and mathematician (1816–1893)
the year 1852; discovery of a relation between the variations of the declination of the magnetic needle and sunspots]. Mittheilungen der Naturforschenden
Rudolf_Wolf
Semi-annual astronomical event where the Sun is directly above the Earth's equator
defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the apparent
Equinox
Complement of latitude; polar angle
the zenith (overhead point) to Polaris is 90 − 42 = 48°. Adding the declination of a star to the observer's colatitude gives the maximum altitude of
Colatitude
Compass error induced by local fields
If not corrected, deviation can lead to inaccurate bearings. Magnetic declination (also called variation) is the angular difference between magnetic north
Magnetic_deviation
Topics referred to by the same term
2020 Canadian thriller drama film Declension, the way words decline Declination (disambiguation) Declinism Decline and Fall (disambiguation) Decline
Decline
Region of space
located 700 million light-years from Earth, at right ascension 14h 50m and declination 46°. The Hercules Superclusters are part of the near edge of the void
Boötes_Void
Nautical instrument
azimuth obtained by astronomical observation to determine the magnetic declination, the amount by which the reading of a ship's compass must be adjusted
Azimuth_compass
Jupiter-family comet
of late August 2026, the comet is around apparent magnitude 9 with a declination of –33. The orbital dust trail created from particles ejected by the
10P/Tempel
Sundial where the gnomon must be moved
location (determines the location of the hour markers on the ellipse). The declination of the sun (determines the daily gnomon position). Analemmatic sundials
Analemmatic_sundial
Asterism
constellation (Aquila, Cygnus, and Lyra, respectively). The greatest declination is +45° and the lowest is +9°, meaning the three stars can be seen from
Summer_Triangle
Phenomenon wherein objects appear to move about their true positions in the sky
a maximum angle of approximately 20 arcseconds in right ascension or declination. The term aberration has historically been used to refer to a number
Aberration_(astronomy)
Fourth letter in the Greek alphabet
used to represent Dee. A subunit of the F1 sector of the F-ATPase. The declination of an object in the equatorial coordinate system of astronomy. The dividend
Delta_(letter)
Celestial coordinate system
it is equal to 90° or 270°. This does not match up to declination exactly zero or declination extreme value because the celestial latitude of the Sun
Apparent_longitude
Angle the planets make to each other in the horoscope
of declination above or below the Celestial Equator. They are not widely used by astrologers. A The same declination of two planets. The declination is
Astrological_aspect
Angle between the zenith and the centre of the Sun's disc
a minimum and is equal to the absolute value of latitude minus solar declination angle. This is the basis by which ancient mariners navigated the oceans
Solar_zenith_angle
Astronomical location
plane. It was first observed by James Bradley as a variation in the declination of stars. Bradley published this discovery in 1748. Because he did not
Equinox (celestial coordinates)
Equinox_(celestial_coordinates)
Tropical solar phenomenon
and the Tropic of Capricorn at approximately 23.5° S) when the Sun's declination becomes equal to the latitude of the location, so that the date varies
Lahaina_Noon
Constellations recognized by the International Astronomical Union
constellation is a region of the sky bordered by arcs of right ascension and declination, together covering the entire celestial sphere. Their boundaries were
IAU_designated_constellations
Process by which people are asked to respond to an invitation
required. The phrase "regrets only" refers to the assumption that a declination will be worded with some variation of "We regret that we cannot attend …"
RSVP
Measure of observed changes in the apparent locations of stars
often J2000.0) are given in the direction of right ascension (μα) and of declination (μδ). Their combined value is computed as the total proper motion (μ)
Proper_motion
Quasar
Constellation Canes Venatici and Coma Berenices Right ascension 12h 28m 24.9s Declination +31° 28′ 38″ Redshift 2.219 Distance 3.31 Gpc (10.8 Gly) (light travel
TON_618
Nautical navigational instrument
sea by measuring the sun's noon altitude (declination) or the meridian altitude of a star of known declination. Not an astrolabe proper, the mariner's astrolabe
Mariner's_astrolabe
Spherical triangle used in astronavigation
moon, a planet, or a star. The position of Z or X is described via its declination—the angular distance north or south of the equator (corresponding to
Navigational_triangle
Legal term
to a declination of prosecution, which is an agreement not to prosecute made before any charges are brought or suit has been filed. A declination of prosecution
Nolle_prosequi
Surveying instrument that uses the Sun's direction instead of magnetism
in a set of tables in an almanac. A correction for this declination is made on the declination arc of the compass, which is mounted to rotate on the polar
Burt's_solar_compass
Set of celestial charts
covering declinations from +25° to -25°; four charts for each hemisphere with straight, converging hour circles and concentric, equally-spaced declination circles
Skalnate Pleso Atlas of the Heavens
Skalnate_Pleso_Atlas_of_the_Heavens
Astronomical survey (1965-1971)
sky area between the limiting declinations of 63°N and 36°S with a resolution at 1415 MHz of 40 arc minutes in declination. The survey was carried out primarily
Ohio_Sky_Survey
D. and for navigation since the 12th century. Although the magnetic declination does shift with time, this wandering is slow enough that a simple compass
Earth's_magnetic_field
listing of stars more luminous than a red dwarf. Right ascension and declination coordinates are for the epoch J2000. The distance measurements are based
List_of_nearest_bright_stars
Celestial coordinate system
on its meridian measured from the celestial pole, similar to the way declination (dec, δ) is measured from the celestial equator. Polar distance in celestial
Polar_distance_(astronomy)
Twice-annual astronomical event when the Sun is farthest from above the Earth's equator
and sistere ('to stand still'), because at the solstices, the Sun's declination appears to "stand still"; that is, the seasonal movement of the Sun's
Solstice
Five early C18 observatories in India
seconds by a skilled observer to determine the time of day, and the declination of the Sun and the other heavenly bodies. It is the world's largest stone
Jantar_Mantar
Constellation straddling the celestial equator
+12° 30′ declination. The constellation extends southward to −30° declination. Segments of the ecliptic within Ophiuchus are south of −20° declination (see
Ophiuchus
Circles of latitude
Expansion. Alfred A. Knopf. pp. 161, 166–167. ISBN 978-1-4000-4292-0. See declination of the Sun "Duration of Daylight/Darkness Table for One Year". U.S. Naval
Circles of latitude between the 40th parallel north and the 45th parallel north
Circles_of_latitude_between_the_40th_parallel_north_and_the_45th_parallel_north
Table of positions of astronomical objects at given times
given in the spherical polar coordinate system of right ascension and declination, together with the distance from the origin if applicable. Some of the
Ephemeris
Arc-like path that the Sun appears to follow across the sky
a minimum and is equal to the absolute value of latitude minus solar declination angle. This is the basis by which ancient mariners navigated the oceans
Sun_path
Record of humanity's attempts to find east-west position on Earth
magnetic declination or variation, and its value varies from place to place. Several writers proposed that the size of magnetic declination could be used
History_of_longitude
Zodiac constellation straddling the celestial equator
approximately this point in the sky, at the March equinox. The right ascension/declination 00 is located within the boundaries of Pisces. Pisces originates from
Pisces_(constellation)
Sub Earth orbiting PSR B1257+12
Source of Radio) followed by the pulsar's right ascension and degrees of declination. The modern convention prefixes the older numbers with a B meaning the
PSR_B1257+12_A
Compass direction
any point on the globe is magnetic variation (also known as magnetic declination, but for the purposes of the mnemonic, the term 'variation' is preferred)
Heading_(navigation)
Kreutz sungrazer comet
cross the celestial equator on 30 March 2026. Due to its relatively low declination in the sky relative to the Sun, it will become more favorable to view
C/2026_A1_(MAPS)
Sixth planet from the Sun
(to orbit) North pole right ascension 40.589°; 2h 42m 21s North pole declination 83.537° Albedo 0.342 (Bond) 0.499 (geometric) Surface temp. min mean
Saturn
Constellation in the northern celestial hemisphere
these borders lie between 16h 00m 26.64s and 18h 57m 49.50s, while the declination coordinates are between +3.67° and +51.32°. In mid-northern latitudes
Hercules_(constellation)
Zodiac constellation in the southern celestial hemisphere
these borders lie between 14h 22m 08.08s and 16h 02m 17.23s, while the declination coordinates are between −0.47° and −30.00°. The whole constellation is
Libra_(constellation)
Horizontal angle from north or other reference cardinal direction
star given its declination and hour angle at a specific location, modify the formula for a spherical Earth. Replace φ2 with declination and longitude difference
Azimuth
Method of orienting telescopes and other celestial observation devices
it is difficult for inexperienced observers to locate in the sky. Its declination of -88° 57′ 23″ places it 1° 2′ 37" from the South Celestial Pole. An
Polar_alignment
Capital and largest city of Greenland
Calculators, National Geophysical Data Center. "Magnetic declination in Nuuk, Greenland". Magnetic Declination. Archived from the original on 23 December 2015
Nuuk
Astronomical phenomenon time
Earth's maximum axial tilt toward the Sun is 23.44°. Likewise, the Sun's declination from the celestial equator is 23.44°. In areas outside the tropics, the
Summer_solstice
Super-Earth orbiting PSR B1257+12
source of radio) followed by the pulsar's right ascension and degrees of declination. The modern convention prefixes the older numbers with a B meaning the
PSR_B1257+12_B
Binary star system in the constellation Reticulum
Herculis Moving Group of co-moving stars that share a common origin. At a declination of −62°, the system is not visible from Britain's latitude of +53°, so
Zeta_Reticuli
Stars that appear green
and Declination +26° 45', placing it within Bootes. The star's identifier signifies J2000 coordinates of Right Ascension 08h 51m and Declination +15°
Green_star_(astronomy)
Short science fiction story by Philip K. Dick (published 1987)
government has determined it to have reached its peak, and to prevent declination, society is forcibly kept in a state of "Stability". Robert Benton, through
Stability_(short_story)
1978 U.S. federal law regulating tribal jurisdiction over court cases involving children
The Indian Child Welfare Act of 1978 (ICWA, enacted November 8, 1978 and codified at 25 U.S.C. §§ 1901–1963) is a United States federal law that governs
Indian_Child_Welfare_Act
Fourteenth-century Korean star map
First Century for the stars with declination less than fifty degrees, and to be near 1395 AD for stars with declination higher than fifty degrees. This
Cheonsang_Yeolcha_Bunyajido
Minor constellation in the southern sky
designations in 1756. The constellation stretches from roughly −39° to −57° declination, and from 23.5h to 2.5h of right ascension. The constellations Phoenix
Phoenix_(constellation)
Symbols used in divinatory geomancy
Sun. Astrologically it is associated with Leo and the Sun in southern declinations; both its inner and outer elemental rulers are fire. It indicates a weakly
Geomantic_figures
Hiatus between prosodic units
Greek παῦσις, pâusis 'stopping, ceasing') is the hiatus between prosodic declination units. The concept is somewhat broad, as it is primarily used to refer
Pausa
Type of celestial coordinate system
set over the span of a year when viewed from the poles because their declinations are constantly changing. When viewed from the equator, objects on the
Horizontal_coordinate_system
Satellite galaxy of the Milky Way
merge with the Milky Way in approximately 2.4 billion years. With a declination of about −70°, the LMC is visible as a faint "cloud" from the Southern
Large_Magellanic_Cloud
Radio galaxy in the constellation Phoenix
Mackey, M. B. (September 1964). "The Parkes catalogue of radio sources, declination zone -20° to -60°". Australian Journal of Physics. 17 (3): 340. Bibcode:1964AuJPh
PKS_J0116−4722
Binary star in the constellation Telescopium
Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H. Cousins, A. W. J.;
HD_177365
K-type giant in the constellation Octans
Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53°. Vol. 1. Bibcode:1975mcts.book.....H. Johnson, H. L.; Mitchell
HD_213402
A-type dwarf; Corona Australis
Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H. Corben, P. M. (April
HD_170384
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