HD 202628
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Microscopium |
| Right ascension | 21h 18m 27.269s |
| Declination | −43° 20′ 04.75″ |
| Apparent magnitude (V) | +6.75 |
| Characteristics | |
| Spectral type | G2V[1] |
| Astrometry | |
| Distance | 79.5 ly (24.4 pc) |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | 11.5 (x-ray)[1] L☉ |
| Surface gravity (log g) | ? cgs |
| Temperature | ? K |
| Metallicity | ? |
| Age | 2.3 ± 1 × 109[1] years |
| Other designations | |
HIP 105184, GJ 825.2, SAO 230622, LTT 2380 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 202628 is a G-type star in the constellation Microscopium with an elliptical (e=0.18) dust disc, inclined at 64◦. The inner edge of the ring, which lies at around 158 AU from the star, is sharply defined.[1] This means that there is a likely planet responsible for this defined edge, and it has been calculated as orbiting between 86 and 158 AU from HD 202628.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | > 1 M⊕ | 86-158[2] | — | ~ 0.2 | — | — |
| Disk | 150–220 AU | — | — | |||
References
- 1 2 3 4 John E. Krist; Karl R. Stapelfeldt; Geoffrey Bryden; Peter Plavchan (2012), "Hubble Space Telescope Observations of the HD 202628 Debris Disk", Astronomical Journal, arXiv:1206.2078
, Bibcode:2012AJ....144...45K, doi:10.1088/0004-6256/144/2/45 - 1 2 Nesvold, Erika R.; Kuchner, Marc J. (2015). "Gap Clearing by Planets in a Collisional Debris Disk". The Astrophysical Journal. 798: 10. arXiv:1410.7784. Bibcode:2015ApJ...798...83N. doi:10.1088/0004-637X/798/2/83. 83.
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