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Measure of angles
Binary angular measurement (BAM) (and the binary angular measurement system, BAMS) is a measure of angles using binary numbers and fixed-point arithmetic
Binary_angular_measurement
System of two stars orbiting each other
astrophysics because they allow direct measurement of stellar masses and test theories of stellar evolution. Binary stars in the night sky that are seen
Binary_star
Fundamental trigonometric functions
integer by an approximation to π2048 would be incurred. (See also Binary angular measurement.) Āryabhaṭa's sine table Bhaskara I's sine approximation formula
Sine_and_cosine
Computer format for representing real numbers
microprocessors. Computations involving angles would use binary angular measurement. Binary fixed point is used in the STM32G4 series CORDIC co-processors
Fixed-point_arithmetic
Ability of any image-forming device to distinguish small details of an object
resolution refers to the precision of a measurement with respect to space, which is directly connected to angular resolution in imaging instruments. The
Angular_resolution
Topics referred to by the same term
usually called Bams), a Canadian - Indonesian singer and songwriter Binary angular measurement system - a digital representation of angles used by computers
BAMS
Topics referred to by the same term
for Berkeley Open Infrastructure for Network Computing software Binary angular measurement, a digital representation of angles used by computers Bile acid
Bam
Property of a numeric data type in computing
different. Sign bit Signed number representations Sign (mathematics) Binary Angular Measurement System, an example of semantics where signedness does not matter
Signedness
Intrinsic quantum property of particles
Spin is an intrinsic form of angular momentum carried by elementary particles, and thus by composite particles such as hadrons, atomic nuclei, and atoms
Spin_(physics)
Angle between the two sightlines or two objects as viewed from an observer
Angular distance or angular separation is the measure of the angle between the orientation of two straight lines, rays, or vectors – typically in three-dimensional
Angular_distance
System consisting of two black holes in close orbit around each other
hole, for example, OJ287 a likely supermassive binary with an orbital period of 12 years. Measurements of the peculiar velocity of the mobile SMBH in
Binary_black_hole
Astronomical object of known size
Gravitational waves originating from the inspiral phase of compact binary system Angular diameter distance – Astronomical concept Parallax – Difference in
Standard_ruler
Unit of plane angle where a full circle equals 1
implicitly have an angular separation of 1/32 turn. The binary degree, also known as the binary radian (or brad), is 1/256 turn. The binary degree is used
Turn_(angle)
Type of stellar binary
closer distances. For a visual binary system, measurements taken need to specify, in arc-seconds, the apparent angular separation on the sky and the position
Visual_binary
Collapsed core of a massive star
pulsars in binary systems, from which the pulsar mass and radius can be estimated, can constrain the neutron star equation of state. A 2021 measurement of the
Neutron_star
How large a sphere or circle appears
The angular diameter, angular width, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large
Angular_diameter
Ordering of binary values, used for positioning and error correction
The reflected binary code (RBC), also known as reflected binary (RB) or Gray code after Frank Gray, is an ordering of the binary numeral system such that
Gray_code
Units that are not part of a coherent system
the 8-Bit Furman. These units are convenient because binary integer overflow resembles angular arithmetic: the value of an 8-bit integer overflows from
List of non-coherent units of measurement
List_of_non-coherent_units_of_measurement
Electromechanical device
called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals
Rotary_encoder
Pair of stars that appear close to each other
visual binary, Mizar's components were found to be spectroscopic binaries themselves. Observation of visual double stars by visual measurement will yield
Double_star
Binary star system in the Cygnus constellation
two stars in the binary to be 400 years, he estimated the distance between the two this would require, and then measured the angular distance between
61_Cygni
Physics problem related to laws of motion and gravity
solution beyond the binary collision, in a process known as regularization. Proving that triple collisions only occur when the angular momentum L vanishes
Three-body_problem
Compact astronomical body
accepted black hole was Cygnus X-1, an x-ray source proposed as a black hole binary through several studies between 1971 and 1974. Black holes typically form
Black_hole
Units for measuring angles
arc minute, or minute arc, denoted by the symbol ′, is a unit of angular measurement equal to 1/60 of a degree. Since one degree is 1/360 of a turn
Minute_and_second_of_arc
Large self-illuminated object in space
into multiple stars distributes some of that angular momentum. The primordial binaries transfer some angular momentum by gravitational interactions during
Star
Iterative technique to find the properties of the stars in a binary pair
astronomy, the distance to a visual binary star may be estimated from the masses of its two components, the angular size of their orbit, and the period
Dynamical_parallax
Type of binary star system
is when a white dwarf and a neutron star or black hole are in a binary. Due to angular momentum loss or gravitational radiation (gravitational wave emission)
Ultracompact_X-ray_binary
Angular motion of a star about its axis
Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the
Stellar_rotation
Type of neutron star with beams of radiation
binary companions had expanded and begun transferring matter on to the neutron star. The process of accretion can, in turn, transfer enough angular momentum
Pulsar
Trace radiation from the early universe
precision and such measurements are critical for cosmological theories. In addition to temperature anisotropy, the CMB should have an angular variation in polarization
Cosmic_microwave_background
Succession of methods by which astronomers determine the distances to celestial objects
{\Delta \theta }{\Delta t}},} where ω is angular velocity, θ is angular extent. In order to get an accurate measurement, it is necessary to make two observations
Cosmic_distance_ladder
Star in the constellation Virgo
double-lined spectroscopic binary. Initially, the orbital parameters for this system were inferred using spectroscopic measurements. Between 1966 and 1970
Spica
Binary star in the constellation Cepheus
VV Cephei, also known as HD 208816, is an eclipsing binary star system located in the constellation Cepheus. It is both a B[e] star and shell star. As
VV_Cephei
Examples of eclipsing binaries are Epsilon Aurigae (Almaaz), VV Cephei, and V766 Centauri (HR 5171). Angular diameter measurements can be inconsistent because
List_of_largest_stars
Frequency swept signal
instantaneous angular chirpyness (symbol γ) is defined to be the second derivative of instantaneous phase or the first derivative of instantaneous angular frequency
Chirp
Astronomical phenomenon due to the gravitational lens effect
detect exoplanets, study limb darkening in distant stars, constrain the binary star population, and constrain the structure of the Milky Way's disk. Microlensing
Gravitational_microlensing
standardisation enabled gauging devices to be effectively used in angular measurement and measurement for construction. Uniform units of length were used in the
History of measurement systems in India
History_of_measurement_systems_in_India
Black hole formed by a collapsed star
mass, electric charge, and angular momentum. The angular momentum of a stellar black hole is due to the conservation of angular momentum of the star or objects
Stellar_black_hole
Study of the movement of stars
observational study or measurement of the kinematics or motions of stars through space. Stellar kinematics encompasses the measurement of stellar velocities
Stellar_kinematics
Gravitational-wave event
though black holes lose energy from gravitational waves and increasing angular momentum (spin), which can reduce surface area, the total surface area
GW250114
Aspect of relativity in physics
and angular momentum and by doing so they carry those away from the source. Gravitational waves perform the same function. Thus, for example, a binary system
Gravitational_wave
Natural phenomenon due to which tidal locking occurs
the Moon's angular rate of orbital motion, due to tidal exchange of angular momentum between Earth and Moon. This increases the Moon's angular momentum
Tidal_acceleration
Extrasolar planet of the binary Kepler-14 system
orbiting binary system. The Kepler team would have not noticed that Kepler-14 was a binary star based solely on initial radial velocity measurements (a standard
Kepler-14b
Red supergiant star in the constellation Orion
2009 by 15%, with the 2008 angular measurement equal to 47.0 mas. Unlike most earlier papers, this study used measurements at one specific wavelength
Betelgeuse
Star system in the Centaurus constellation
are Sun-like stars (class G and K, respectively) that together form the binary star system α Centauri AB. To the naked eye, these two main components appear
Alpha_Centauri
Unit of information in a quantum computer
|𝑑−1⟩. Early papers in the 1990s exploring Quantum d-ary systems or non-binary quantum codes began using the term "qudit" to simplify the description of
Qudit
Second brightest star in the constellation Sagittarius
published in 2025 again found Nunki to be a close binary of similar components, which were detected at an angular separation of 8.644 milliarcseconds. There
Sigma_Sagittarii
Star in the constellation Cancer
angular rate of 0.578″ yr−1. It is drifting further away with a line of sight velocity of 49.8 km/s. 81 Cancri was found to be a close visual binary by
81_Cancri
Binary star system in the constellation Reticulum
confirming that they are gravitationally bound and form a wide binary star system. They have an angular separation of 309.2 arcseconds (5.2 arcminutes); far enough
Zeta_Reticuli
Stellar core remnant
members of binary systems (the fastest one being the white dwarf in CTCV J2056-3014). A close binary system of two white dwarfs can lose angular momentum
White_dwarf
Type of supernova in binary systems
form a circumbinary disk, whose interaction with the compact binary can extract orbital angular momentum and help drive the merger. The merger remnant may
Type_Ia_supernova
Structure formed by diffuse material in orbital motion around a massive central body
astrophysical measurements using gravitational lensing. Balbus and Hawley (1991) proposed a mechanism which involves magnetic fields to generate the angular momentum
Accretion_disk
System of codes for unambiguously representing measurement units
this is common practice. Binary prefixes are also supported. UCUM recognizes units that are defined by a particular measurement procedure, and which cannot
Unified Code for Units of Measure
Unified_Code_for_Units_of_Measure
2025[update] has no official designation or name. Huya and its moon form a binary system, and are together referred to as the Huya system. The moon was discovered
Moon_of_38628_Huya
Signal used to represent data as a sequence of discrete values
signal or binary signal when it is interpreted in terms of only two possible digits. The two states are usually represented by some measurement of an electrical
Digital_signal
Near-Earth asteroid
Didymos (provisional designation 1996 GT) is a sub-kilometer asteroid and binary system that is classified as a potentially hazardous asteroid and near-Earth
65803_Didymos
Binary star system in the constellation Andromeda
C......0W. Hummel, C. A.; et al. (July 1995). "Orbits of Small Angular Scale Binaries Resolved with the Mark III Interferometer". Astronomical Journal
Pi_Andromedae
Sextuple star system in Gemini
separation between the binary systems Castor A and Castor B has increased from about 2″ (2 arcseconds of angular measurement) in 1970 to about 6″ in
Castor_(star)
causes them to lose energy and angular momentum gradually, as illustrated by the binary pulsar PSR B1913+16. For binary black holes, the numerical solution
Two-body problem in general relativity
Two-body_problem_in_general_relativity
Star in the constellation Boötes
Xi Boötis is a binary star system in the northern constellation of Boötes. Its name is a Bayer designation that is Latinised from ξ Boötis, and abbreviated
Xi_Boötis
Mechanics concept
and a single measurement shows they are near-to-evenly distributed. For rotational diffusion about a single axis, the mean-square angular deviation in
Rotational_diffusion
Binary star in the constellation Scorpius
calculated from its angular diameter and distance. However, the distance to Antares is not known with the same accuracy as modern measurements of its diameter
Antares
Main-belt asteroid
was used to construct a model for the asteroid, revealing it to be an angular object that is spinning about a pole with ecliptic coordinates (β, λ) =
32_Pomona
Electromagnetic radiation due to deceleration of charged particles
temperature Te. Following Bekefi, the power spectral density (power per angular frequency interval per volume, integrated over the whole 4π sr of solid
Bremsstrahlung
Observation in physical cosmology
February 2019). "Baryon acoustic oscillation, Hubble parameter, and angular size measurement constraints on the Hubble constant, dark energy dynamics, and spatial
Hubble's_law
Binary star in the constellation Sagittarius
Epsilon Sgr, ε Sgr), formally named Kaus Australis /ˈkɔːs ɔːˈstreɪlɪs/, is a binary star system in the southern zodiac constellation of Sagittarius. The apparent
Epsilon_Sagittarii
Worldwide computer-based distributed discussion system
8-bit values into ASCII, it became practical to distribute binary files as content. Binary posts, due to their size and often-dubious copyright status
Usenet
Brightest star in the constellation Auriga
calculated by comparison of observed and synthetic spectra, direct measurement of their angular diameters and brightnesses, calibration against their observed
Capella
Binary star in the constellation of Delphinus
Beta Delphini is a binary star system in the constellation of Delphinus. It is the brightest star in Delphinus with a combined apparent visual magnitude
Beta_Delphini
Electromagnetic measurement technique
impedance measurements for optimal machine setting" (PDF). Measurement. 45 (7): 1747–1754. Bibcode:2012Meas...45.1747G. doi:10.1016/j.measurement.2012.04
Dielectric_spectroscopy
shadow of the planet transiting. This could provide a direct measurement of the planet's angular radius and, via parallax, its actual radius. This is more
Methods of detecting exoplanets
Methods_of_detecting_exoplanets
Double star system in the constellation Cygnus
contains more data and improved binary star orbit analysis compared to previous releases; this enabled the first direct measurement of the acceleration upon
Albireo
Multiple-star system in the constellation of Perseus
58 Persei is a binary and possibly a triple star system in the northern constellation of Perseus. It has the Bayer designation e Persei, while 58 Persei
58_Persei
Largest Jupiter trojan
Hektor in 1993 did not show an obvious bilobate shape because of a limited angular resolution. On 17 July 2006, the Keck 10-meter-II-telescope and its laser
624_Hektor
Brightest star in the constellation Orion
606±0.009 mas, yielding a radius of 74.1+6.1 −7.3 R☉. An older measurement of the angular diameter gives 2.75±0.01 mas, equivalent to a radius of 78.9 R☉
Rigel
Natural satellites orbiting Pluto
and is massive enough that Pluto and Charon are sometimes considered a binary dwarf planet. The innermost and largest moon, Charon, was discovered by
Moons_of_Pluto
Star in the constellation Aries
Gamma Arietis is a binary or possibly trinary star system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from
Gamma_Arietis
Binary star in the northern constellation of Boötes
Based on parallax measurements, the system is located at a distance of 123 light-years. The components of the system have an angular separation of 0.10″
Mu1_Boötis
Multiple star system in the constellation Hercules
Zeta Herculis, Latinized from ζ Herculis, formally named Tianji, is a binary star system in the constellation Hercules. It has a combined apparent visual
Zeta_Herculis
Binary star system in the constellation Ursa Minor
Epsilon Ursae Minoris (ε Ursae Minoris) is a binary star system in the northern circumpolar constellation of Ursa Minor. It is visible to the naked eye
Epsilon_Ursae_Minoris
Multiple star in the constellation Taurus
is either a solitary, binary or double star (the Washington Double Star Catalog notes it as a "Dubious Double" or "Bogus Binary") that marks the tip of
Gamma_Tauri
Theoretical cosmological structure
is subjected to dynamical friction which causes it to lose energy and angular momentum to the dark matter particles of its host. Whether a subhalo survives
Dark_matter_halo
Star in the constellation Sagittarius
of −43.4 km/s. This is a visual binary with an orbital period of 5.6985 years, an eccentricity of 0.710, and an angular semimajor axis of 66.4 mas. The
Chi1_Sagittarii
Physical constant equal to the speed of light
orbital decay rate of binary pulsars PSR 1913+16 (the Hulse–Taylor binary system noted above) and PSR B1534+12. The orbits of these binary pulsars are decaying
Speed_of_gravity
2015 detection made by LIGO interferometers
Weisberg, J. M.; Nice, D. J.; Taylor, J. H. (2010). "Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16". Astrophysical Journal. 722 (2): 1030–1034
First observation of gravitational waves
First_observation_of_gravitational_waves
Binary star in the constellation Leo
ideal conditions. Parallax measurements by the Gaia spacecraft imply a distance of 460 light-years (142 parsecs). The binary nature of 73 Leonis was initially
73_Leonis
Multiple star system in the constellation Delphinus
WASP-2 spectrum in 2015 resulted in the measurement of the stellar companion's temperature as 3513±28 K, and an angular separation of 0.73 arcseconds. The
WASP-2
Star system in the constellation Pisces
stars with an angular separation of 0.15 arcseconds and visual magnitude 5.28. The secondary, Zeta Piscium B, is a spectroscopic binary with a period
Zeta_Piscium
Star in the constellation Apus
Kappa1 Apodis is a binary star system in the southern circumpolar constellation of Apus. Its idetifier is a Bayer designation that is Latinized from κ1
Kappa1_Apodis
Upper bound to the mass of cold, nonrotating neutron stars
et al. (27 November 2019). "A wide star–black-hole binary system from radial-velocity measurements". Nature. 575 (7784): 618–621. arXiv:1911.11989. Bibcode:2019Natur
Tolman–Oppenheimer–Volkoff limit
Tolman–Oppenheimer–Volkoff_limit
Brightest star in the constellation Octans
gathered by 2021. With new radial velocity measurements, a study in 2025 confirmed the planet's existence. The binary components in the Nu Octantis system were
Nu_Octantis
Hypothetical star orbiting the Sun, supposedly responsible for extinction events
theories suggest that other forces, like close passage of other stars, or the angular effect of the galactic gravity plane working against the outer solar orbital
Nemesis_(hypothetical_star)
Overview of and topical guide to geometry
Infinitesimal transformation Geometric progression Geometric shape Pi Angular velocity Linear velocity De Moivre's theorem Similar triangles Unit circle
Outline_of_geometry
Double star in Boötes
Epsilon Boötis is a binary star system in the northern constellation of Boötes. The two components have the proper names Izar (/ˈaɪzɑːr/, EYE-zar) and
Epsilon_Boötis
X-ray binary in Cygnus containing a stellar black hole
other likely object besides a black hole. Cygnus X-1 is a high-mass X-ray binary system located about 7,000 light-years away, that includes a blue supergiant
Cygnus_X-1
Star in the constellation Ursa Major
.0W Gazeas, K.; Stȩpień, K. (November 2008), "Angular momentum and mass evolution of contact binaries", Monthly Notices of the Royal Astronomical Society
W_Ursae_Majoris
Brightness of a celestial object observed from the Earth
by the Hubble Space Telescope. The measurement of apparent magnitude is called photometry. Photometric measurements are made in the ultraviolet, visible
Apparent_magnitude
Star in the constellation Scorpius
that it formed via the merger of a binary star system. A magnitude 5.36 companion has been reported at an angular separation of 6.470 arcseconds, but
Theta_Scorpii
Star in the constellation Cygnus
Epsilon Cygni is a binary star system in the constellation of Cygnus. Its name is a Bayer designation. With an apparent visual magnitude of 2.48, it is
Epsilon_Cygni
Star in the constellation Virgo
HD 109271 is a wide binary star system in the constellation of Virgo. The brighter member of the binary has a pair of orbiting exoplanets. With an apparent
HD_109271
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BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
BINARY ANGULAR-MEASUREMENT
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