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HD 98800
Artist's impression of HD 98800 |
Observation data
Epoch J2000 |
Constellation
(pronunciation) |
Crater |
| Right ascension |
11h 22m 05.2898s |
| Declination |
-24° 46' 39.760 "' |
| Apparent magnitude (V) |
9.11 |
| Characteristics |
| Spectral type |
K5Ve |
| U-B color index |
? |
| B-V color index |
? |
| Variable type |
None |
| Astrometry |
| Radial velocity (Rv) |
9.25 km/s |
| Proper motion (μ) |
RA: -85.45 mas/yr
Dec.: -33.37 mas/yr |
| Parallax (π) |
21.43 ± 2.86 mas |
| Distance |
approx. 150 ly
(approx. 47 pc) |
| Absolute magnitude (MV) |
10.27 |
| Details |
| Mass |
? M☉ |
| Radius |
? R☉ |
| Luminosity |
? L☉ |
| Temperature |
? K |
| Metallicity |
? |
| Rotation |
? |
| Age |
10 million years |
| Visual binary orbit |
| Companion |
HD 98800 A 1/2 |
| Period (P) |
0 yr |
| Semimajor axis (a) |
50 AU" |
| Eccentricity (e) |
0 |
| Inclination (i) |
0° |
| Longitude of the node (Ω) |
0° |
| Periastron epoch (T) |
0 |
| Visual binary orbit |
| Companion |
HD 98800 B 1/2 |
| Period (P) |
0 yr |
| Semimajor axis (a) |
50 AU" |
| Eccentricity (e) |
0 |
| Inclination (i) |
0° |
| Longitude of the node (Ω) |
0° |
| Periastron epoch (T) |
0 |
| Visual binary orbit |
| Companion |
HD 98800 AB |
| Period (P) |
0 yr |
| Semimajor axis (a) |
50 AU" |
| Eccentricity (e) |
0 |
| Inclination (i) |
0° |
| Longitude of the node (Ω) |
0° |
| Periastron epoch (T) |
0 |
| Other designations |
V* TV Crt, GLMP 294, MCBB 3-84, TWA 4A, ** I 507, GSC 06654-00219, ADS 8141 A, HD 98800A, RBS 975, UGP 267, CD-24 9706, HIC 55505, HIP 55505, SAO 179815, GJ 2084 A, TWA 4. |
| Database references |
| SIMBAD |
data |
HD 98800 is a quadruple star system located in the TW Hydrae association. The system consists of four T Tauri stars orbiting as a pair of stellar binaries, designated HD 98800A and HD 98800B and separated by 50 AU. HD 98800B is circled by debris ring extending to 5.9 AU from the barycenter of the system and which is consistent with models of planet formation, having an age of about 10 million years. Observations by the Spitzer Space Telescope indicate that HD 98800B may have a planet orbiting it as well at a distance of 1.5 to 2 AU.
[edit] References
