HD 10307
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Andromeda |
| Right ascension | 01h 41m 47.1s |
| Declination | +42° 36' 48.1" |
| Apparent magnitude (V) | +4.95/+12.5 |
| Characteristics | |
| Spectral type | G1.5 V/M V |
| U-B color index | 0.11 |
| B-V color index | 0.62 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +3.1 km/s |
| Proper motion (μ) | RA: 791.35 mas/yr Dec.: -180.16 mas/yr |
| Parallax (π) | 79.09 ± 0.83 mas |
| Distance | 41.2 ± 0.4 ly (12.6 ± 0.1 pc) |
| Absolute magnitude (MV) | 4.30/11.9 |
| Details | |
| Mass | 0.97/0.29 M☉ |
| Radius | 1.20/? R☉ |
| Surface gravity (log g) | 4.35/? |
| Luminosity | 1.44/0.0013 L☉ |
| Temperature | 5874/? K |
| Metallicity | 96% Sun |
| Rotation | ?/? |
| Age | 5.9 × 109 years |
| Visual binary orbit | |
| Companion | HR 483 B |
| Period (P) | 19.5 yr |
| Semimajor axis (a) | 0.58" |
| Eccentricity (e) | 0.43 |
| Inclination (i) | 103° |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
| Other designations | |
HD 10307 (aka HR 483 A) is a star similar to the sun in mass, temperature and metal content, situated about 41 light-years from Earth in the constellation Andromeda. Its companion, HR 483 B, is a little-studied red dwarf.
HD 10307 was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars.
Contents |
[edit] System
HR 483 is a binary star located 41.2 ly away, in Andromeda. The pair orbit one another elliptically (e=0.43), approaching as close as 4.2 AU and receding to 10.5 AU, with a period of just under twenty years. Due to the high margins of error on the mass estimates for the two stars, these orbital parameters are approximate.
HD 10307, the larger component, is a main sequence, yellow, sun-like star, only slightly brighter, hotter, and larger than the Sun. HR 483 B, the smaller component, appears to be a red dwarf, with as little as thirty percent the mass of the sun.
[edit] Possibility of planets and life
The presence of a moderately close companion could disrupt the orbit of a hypothetical planet in HD 10307's habitable zone. However, the uncertainty of the orbital parameters makes it equally uncertain exactly where stable orbits would be in this system.
[edit] METI message to HD 10307
There was a METI message sent to HD 10307. It was transmitted from Eurasia's largest radar — 70-meter Eupatoria Planetary Radar. The message was named Cosmic Call 2, it was sent on July 6, 2003, and it will arrive at HD 10307 in September 2044. [1]
[edit] References
[edit] External links
- ARICNS: 00144 (A)
- ARICNS: 00145 (B)
- NStars: 0141+4236
- SolStation: HR 483 / HD 10307 AB
- Space.com: Top 10 List of Habitable Stars to Guide Search
- Spectra HD 10307
 |
This star-related article is a stub. You can help Wikipedia by expanding it. |
