Global InformationAlpha Caeli information
 Alpha Caeli is at lower center. | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Caelum |
| A | |
| Right ascension | 04h 40m 33.7125s |
| Declination | −41° 51′ 49.509″[1] |
| Apparent magnitude (V) | 4.456 |
| B | |
| Right ascension | 04h 40m 34.0s |
| Declination | −41° 51′ 51″[2] |
| Apparent magnitude (V) | 12.5[2] |
| Characteristics | |
| A | |
| Spectral type | F2V[3] |
| U−B color index | +0.01[4] |
| B−V color index | +0.34[4] |
| B | |
| Spectral type | M0.5[2] |
| Astrometry | |
| A | |
| Radial velocity (Rv) | –0.6 ± 0.9[5] km/s |
| Proper motion (μ) | RA: –141.18[1] mas/yr Dec.: –74.95[1] mas/yr |
| Parallax (π) | 49.67 ± 0.53 mas[1] |
| Distance | 65.7 ± 0.7 ly (20.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 3.39[6] |
| B | |
| Radial velocity (Rv) | −0.6 ± 0.9[2] km/s |
| Proper motion (μ) | RA: −147[2] mas/yr Dec.: −78[2] mas/yr |
| Details | |
| A | |
| Mass | 1.48[7] M☉ |
| Radius | 1.3[8] R☉ |
| Surface gravity (log g) | 4.01[3] cgs |
| Temperature | 6,991[3] K |
| Metallicity [Fe/H] | −0.10[3] dex |
| Rotational velocity (v sin i) | 47.8±2.4[9] km/s |
| Age | 0.9 (0.7–1.3)[7] Gyr |
| B | |
| Mass | 0.3[10] M☉ |
| Temperature | 3,800[10] K |
| Other designations | |
A: CCDM J04406-4152A, CD−42°1587, CPD−42°513, FK5 1129, GC 5708, Gl 174.1 A, GJ 9164 A, HD 29875, HIP 21770, HR 1502, IDS 04373-4203 A, SAO 216926.[11] B: CCDM J04406-4152B, CD−42°1587B, CPD−42°513B, Gl 174.1 B, GJ 9164 B, IDS 04373-4203 B.[2] | |
| Database references | |
| SIMBAD | A |
| B | |
Alpha Caeli (α Cae, α Caeli) is a double star system in the constellation Caelum.
- ^ a b c d Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- ^ a b c d e f g GJ 174.1 B -- Flare Star, database entry, SIMBAD. Accessed on line November 5, 2009.
- ^ a b c d Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
- ^ a b Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
- ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: Academic Press. Bibcode:1967IAUS...30...57E.
- ^ Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911, S2CID 8642707
- ^ a b Cite error: The named reference
aaa418was invoked but never defined (see the help page). - ^ Cite error: The named reference
aaa367was invoked but never defined (see the help page). - ^ Cite error: The named reference
aaa412was invoked but never defined (see the help page). - ^ a b Alpha Cae, Stars, Jim Kaler. Accessed on line November 5, 2009.
- ^ * alf Cae -- Star in double system, database entry, SIMBAD. Accessed on line November 4, 2009.