# arcsecond

• 1 arcsecond — (″ or as or sec or s)    a unit of angular measure, also called the second of arc, equal to 1/60 arcminute. One arcsecond is a very small angle indeed: there are 1 296 000 seconds in a circle. The SI defines s as the symbol for the time unit and… …

Dictionary of units of measurement

• 2 Arcsecond — …

Википедия

• 3 arcsecond — noun A unit of angle; 1/60th of an arcminute, or 1/3600th of a degree. Syn: second of arc, as, arcsec See Also: arcminute …

Wiktionary

• 4 arcsecond — noun a 60th part of a minute of arc the treasure is 2 minutes and 45 seconds south of here • Syn: ↑second • Hypernyms: ↑angular unit • Part Holonyms: ↑minute, ↑arcminute, ↑ …

Useful english dictionary

• 5 Minute of arc — This article is about geometry. For firearms terminology, see Minute of Angle. A minute of arc, arcminute, or minute of angle (MOA), is a unit of angular measurement equal to one sixtieth (1⁄60) of one degree. In turn, a second of arc or… …

Wikipedia

• 6 Parsec — For other uses, see Parsec (disambiguation). 1 parsec = SI units 30.857×10^12 km 30.857×10^15 m Astronomical units 206.26× …

Wikipedia

• 7 Beta Tucanae — Starbox short name=β¹,² Tucanae epoch=J2000.0 constell=Tucana ra=00h 31m 32.7s dec=−62° 57 29 spectral=AB: A2V+B9V CD: A2V+A7V appmag v=β¹: +4.36 β²: +4.53 dist ly=140 ± 3 dist pc=43 ± 1 names=HR 126 + HR 126, HD 2884 + HD 2885, CP 63 50, HIP… …

Wikipedia

• 8 parsec — (pc or psc)    a non metric unit of distance used in astronomy. As the Earth makes its orbit around the Sun, nearby stars appear to shift their positions in relation to the background of distant stars. This shift, called the parallax of the star …

Dictionary of units of measurement

• 9 Light pollution — This article is about light pollution in the visible spectrum. For information on pollution in the radio spectrum, see radio spectrum pollution. This time exposure photo of New York City at night shows skyglow, one form of light pollution …

Wikipedia

• 10 Vega — Starbox begin name=Vega Starbox image caption = Location of Vega in the constellation Lyra. Starbox observe epoch=J2000.0 constell=Lyra ra=RA|18|36|56.3364cite web author=Staff date=October 30, 2007 url=http://simbad.u strasbg.fr/simbad/sim… …

Wikipedia

• 11 Angular resolution — describes the resolving power of any image forming device such as an optical or radio telescope, a microscope, a camera, or an eye. Definition of terms Resolving power is the ability of the components of an imaging device to measure the angular… …

Wikipedia

• 12 MERLIN — For other uses, see Merlin (disambiguation). Multi Element Radio Linked Interferometer Network A map showing the locations of the antennas used in MERLIN Organization …

Wikipedia

• 13 Surface brightness — is a concept used in astronomy when describing extended astronomical objects such as galaxies and nebulae.General descriptionThe apparent magnitude of an astronomical object is generally given as an integrated value mdash;if a galaxy is quoted as …

Wikipedia

• 14 Zeta Cancri — Starbox short name=ζ Cancri A/B/C epoch=J2000.0 constell=Cancer ra=08h12m12.7s dec=+17°38′52″ spectral=F7V+F9V+G0V appmag v=+5.58/+5.99/+6.12 dist ly=83.4 ± 2.9 dist pc=25.6 ± 0.9 names=Tegmen, Tegmine, 16 Cancri, HR 3208/3209/3210, HD… …

Wikipedia

• 15 Pi Ursae Minoris — The Bayer designation Pi Ursae Minoris (π UMi / π Ursae Minoris) is shared by two star systems, π¹ Ursae Minoris and π² Ursae Minoris, in the constellation Ursa Minor. They are separated by 0.64° on the sky. π¹ Ursae Minoris Starbox short name=π¹ …

Wikipedia

• 16 Pi Arietis — Starbox begin name=π Arietis Starbox image caption = π Arietis Starbox observe epoch=J2000 ra=02h 49m 17.5599s dec= +17° 27 prime; 51.512 Prime; appmag v=5.314 constell=Aries Starbox character class=B6V r i = v r = b v = 0.06 u b = 0.47 variable …

Wikipedia

• 17 Lambda Aurigae — Starbox begin name=λ Aurigae A Starbox observe epoch=J2000 ra=05h 19m 08.5s dec=+40° 05 prime; 57 Prime; appmag v=4.69 constell=Auriga Starbox character class=G1.5 IV VFe 1 r i = 0.32 v r = b v=0.63 u b=0.12 variable=? Starbox astrometry radial v …

Wikipedia

• 18 Thirty Meter Telescope — The Thirty Meter Telescope (TMT) will be a ground based astronomical observatory with a 30 metre (98 foot) diameter segmented mirror capable of observations from the near ultraviolet to the mid infrared (0.31 to 28 micrometres). An adaptive… …

Wikipedia

• 19 Iota Cassiopeiae — Starbox short name=ι Cassiopeiae A/B/C epoch=J2000.0 constell=Cassiopeia ra=02h29m04.0s dec=+67°24′09″ spectral=A3Vp/F5V/G7V appmag v=+4.64/+6.89/+8.40 dist ly=141.6 ± 4.9 dist pc=43.4 ± 1.5 names=HR 707, HD 15089, BD+66°213, HIP 11569, SAO 12298 …

Wikipedia

• 20 HD 72108 — Starbox short name=HD 72108 epoch=J2000.0 constell=Vela ra=08h 29m 04.7s dec=−47° 55 45 spectral=B2IV appmag v=+5.33 absmag v= 1.06 dist ly=1640 ± 620 dist pc=500 ± 190 names=HR 3358, HD 72108, CD 47°4004, HIP 41616, SAO 219985, GC 11630, CCDM… …

Wikipedia

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