Upsilon Carinae
Template:Short descriptionScript error: No such module "Distinguish".
Template:Location mark Location of υ Carinae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 2.97[2] (+3.08/+6.25[3]) |
| Characteristics | |
| Spectral type | A8 Ib + B7 III[4] |
| U−B Template:Engvar | +0.13[2] |
| B−V Template:Engvar | +0.27[2] |
| Astrometry | |
| Radial velocity (Rv) | +14[4] km/s |
| Proper motion (μ) | RA: −11.51[1] mas/yr Dec.: +4.71[1] mas/yr |
| Parallax (π) | 2.27±0.28 mas[1] |
| Distance | approx. Template:Rnd ly (approx. Template:Rnd pc) |
| Absolute magnitude (MV) | −5.26[5] |
| Details | |
| υ Car A | |
| Mass | 10.88[6] Template:Solar mass |
| Radius | 96.6Template:Snd100[6] Template:Solar radius |
| Surface gravity (log g) | Script error: No such module "val".[6] cgs |
| Temperature | Script error: No such module "val".[6] K |
| Age | 23.4[6] Myr |
| υ Car B | |
| Mass | 8[4] Template:Solar mass |
| Surface gravity (log g) | Script error: No such module "val".[4] cgs |
| Temperature | Script error: No such module "val".[4] K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| υ Car, CP−64°1084, HIP 48002[7] | |
| A: HD 85124, HR 3890, SAO 250696 | |
| B: HD 85123, HR 3891, SAO 250695 | |
| Database references | |
| SIMBAD | system |
| A | |
| B | |
Script error: No such module "Check for unknown parameters".
Upsilon Carinae, Latinized from υ Carinae, is a double star in the southern constellation of Carina. It is part of the Diamond Cross asterism in southern Carina. The Upsilon Carinae system has a combined apparent magnitude of +2.97[2] and is approximately 1,400 light years (440 parsecs) from Earth.[1]
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Sea Rock, refers to an asterism consisting of υ Carinae, ε Carinae, ι Carinae, HD 83183 and HD 84810.[8] Consequently, υ Carinae itself is known as Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[9]
The primary component, υ Carinae A, has a stellar classification of A8 Ib, making it a supergiant star that has exhausted the hydrogen at its core and evolved away from its brief main sequence lifetime as an B-type star.[6] With an apparent magnitude of +3.08,[3] it has an effective temperature of about 7,500 K,[6] giving it a white hue. The companion, υ Carinae B, is a giant star with a classification of B7 III,[3] although Mandrini and Niemela (1986) suggested it may be a subgiant star with a classification of B4–5 IV.[4] The outer envelope of this star has an effective temperature of around 23,000 K, resulting in the blue-white hue of a B-type star.
The two stars have an angular separation of 5.030 arcseconds. As a binary star system, they would have an estimated orbital period of at least 19,500 years and a present-day separation of around 2,000 Astronomical Units.[4] This system is roughly 12 million years old.[10]
In the next 7500 years, the south Celestial pole will pass close to these stars and Iota Carinae (8100 CE).[11]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e f Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ a b c d e f g Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d e f g Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 28 日 Template:Webarchive
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".