Gamma Aquarii
γ Aquarii
Observation data
Epoch J2000 Equinox J2000 |
| Constellation |
Aquarius |
| Right ascension |
22h 21m 39.3754s |
| Declination |
-01° 23′ 14.393″ |
| Apparent magnitude (V) |
3.847 |
| Characteristics |
| Spectral type |
A0V |
| U−B color index |
-0.12 |
| B−V color index |
-0.05 |
| Astrometry |
|
| Radial velocity (Rv) |
-15 km/s |
| Proper motion (μ) |
RA: 129.24 mas/yr
Dec.: 8.90 mas/yr |
| Parallax (π) |
20.67 ± 1.71 mas |
| Distance |
160 ± 10 ly
(48 ± 4 pc) |
| Absolute magnitude (MV) |
3.815 |
|
| Details |
|
| Mass |
3.1 M☉ |
| Radius |
2.1 R☉ |
| Luminosity |
40 L☉ |
| Temperature |
7,500–10,000 K |
| Rotation |
0,0051135863788 Year |
|
| Other designations |
Sadalachbia, Sadachbia, 48 Aquarii, Wo 9779, HR 8518, HD 212061, BD-02°5741, FK5 842, HIP 110395, SAO 146044, GC 31257, ADS 15864, CCDM 22217-0123. |
| Database references |
| SIMBAD |
data |
| Database references |
| SIMBAD |
data |
Gamma Aquarii (γ Aqr, γ Aquarii) is a star in the constellation Aquarius. It has the traditional name Sadachbia, from an Arabic expression سعد الأخبية sa‘d al-’axbiyah "luck of the homes (tents)" in Hindu system it is also called Sadhabhisk in devnagari, sadhayam in tamil.
In the catalogue of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Aoul al Achbiya (أول ألأجبية - awwil al ahbiyah), which was translated into Latin as Prima Tabernaculorum, meaning the first of luck of the homes (tents).[1][2]. This star, along with π Aqr (Seat), ζ Aqr (Sadaltager / Achr al Achbiya) and η Aqr (Hydria), were al Aḣbiyah (الأخبية), the Tent.[3][4][5]
In Chinese, 墳墓 (Fén Mù), meaning Tomb, refers to an asterism consisting of γ Aquarii, ζ Aquarii, η Aquarii, π Aquarii.[6] Consequently, γ Aquarii itself is known as 墳墓二 (Fén Mù èr, English: the Second Star of Tomb).[7]
It has an apparent magnitude of 3.84, and is 158 light years from Earth.
References
- ^ Knobel, E. B. (June 1895). "Al Achsasi Al Mouakket, on a catalogue of stars in the Calendarium of Mohammad Al Achsasi Al Mouakket". Monthly Notices of the Royal Astronomical Society 55: 429. Bibcode 1895MNRAS..55..429K.
- ^ Knobel, E. B. (June 1895). "Al Achsasi Al Mouakket, on a catalogue of stars in the Calendarium of Mohammad Al Achsasi Al Mouakket". Monthly Notices of the Royal Astronomical Society 55: 429. Bibcode 1895MNRAS..55..429K.
- ^ Davis Jr., G. A., "The Pronunciations, Derivations, and Meanings of a Selected List of Star Names,"Popular Astronomy, Vol. LII, No. 3, Oct. 1944, p. 12.
- ^ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York: Dover Publications Inc. p. 52. ISBN 0486210790. http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Aquarius*.html. Retrieved 2010-12-12.
- ^ γ Aqr as Aoul al Achbiya or Prima Tabernaculorum (the first of luck of the homes or tents), π Aqr as Wasat al Achbiya or Media Tabernaculorum (the middle of luck of the homes or tents) and ζ Aqr as Achr al Achbiya or Postrema Tabernaculorum (the end of luck of the homes or tents). η Aqr should be designated as al Achbiya consistently, but it was not designated as the Arabian name except the name Hydria (Greek) or Deli (Hebrew)
- ^ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
- ^ (Chinese) 香港太空館 - 研究資源 - 亮星中英對照表, Hong Kong Space Museum. Accessed on line November 23, 2010.