HD 92945
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Hydra |
| Right ascension | 10h 43m 28.2717s[1] |
| Declination | −29° 03′ 51.421″[1] |
| Apparent magnitude (V) | 7.76[1] |
| Characteristics | |
| Spectral type | K1V[1] |
| B−V color index | 0.9[1] |
| Variable type | BY[2] |
| Astrometry | |
| Radial velocity (Rv) | 22.6 ± 0.3[1] km/s |
| Proper motion (μ) | RA: −215.39[1] mas/yr Dec.: −48.50[1] mas/yr |
| Parallax (π) | 46.36 ± 0.84[1] mas |
| Distance | 70 ± 1 ly (21.6 ± 0.4 pc) |
| Absolute magnitude (MV) | 6.09[3] |
| Details | |
| Mass | 0.80 (0.77 to 0.85)[4] M☉ |
| Radius | 0.77[5] R☉ |
| Luminosity | 0.38[5] L☉ |
| Temperature | 5000[4] K |
| Metallicity [Fe/H] | −0.17[4] dex |
| Rotational velocity (v sin i) | 4[4] km/s |
| Age | 294 ± 23[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 92945 is a K-type main sequence star in the constellation of Hydra.[1] Its apparent visual magnitude varies by 0.02 magnitudes and is approximately 7.72 at maximum brightness.[2] A debris disk has been observed around the star by coronagraphic imaging, using the ACS and NICMOS instruments on the Hubble Space Telescope. It appears to extend 45 to 175 astronomical units from HD 92945 and is inclined at approximately 29 degrees.[6]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 V* V419 Hya -- Variable of BY Dra type, database entry, SIMBAD. Accessed on line February 2, 2011.
- ↑ 2.0 2.1 V419 Hya, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line February 2, 2011.
- ↑ From apparent magnitude and parallax.
- ↑ 4.0 4.1 4.2 4.3 HD 92945, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 2, 2011.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Observations and Models of the Debris Disk around the K dwarf HD 92945, D. Golimowski et al., Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21st Century, Paul Kalas, ed., June 4–8, 2007, University of California, Berkeley, Bibcode: 2007lyot.confE..46G.
