Beta Caeli
  | ||
| Observation data ICRS )
| ||
|---|---|---|
| Constellation | Caelum
| |
| Right ascension | 04h 42m 03.48230s[1] | |
| Declination | −37° 08′ 39.5889″[1] | |
| Apparent magnitude (V) | 5.04[2] | |
| Characteristics | ||
| Spectral type | F3 V[3] or F3 IV[4] | |
| U−B color index | +0.01[2] | |
| B−V color index | +0.38[2] | |
| Absolute magnitude (MV) | +2.64[6] | |
| Details | ||
| β Cae A | ||
Gyr | ||
| β Cae B | ||
| Mass | 0.08 or 0.2[7] M☉ | |
| Temperature | 3,593±160[7] K | |
Argument of periastron (ω)(secondary) | 38° | |
| Database references | ||
| SIMBAD | data | |
Beta Caeli (β Caeli, abbreviated to β Cae) is a
light years. The star is moving away from the Sun with a radial velocity of +27.5 km/s.[5]
Characteristics
This is a
projected rotational velocity of around 97.5 km/s.[6]
The companion is a low-mass star orbiting about 5
AU from the primary, with an orbital period around seven years. Its exact mass is uncertain; an orbital solution suggest it is close to the brown dwarf regime at around 0.08 M☉, but models of stellar atmospheres suggest a higher mass of 0.2 M☉.[7] It was first detected in 2017 and was believed to be either a brown dwarf or a star with minimum mass around 40 Jupiter masses.[8] In 2022, Beta Caeli was imaged with the Gemini Planet Imager, with a point source that very likely is β Caeli B been detected.[7] This object may be the source of the X-ray emission coming from the same location.[8]
The existence of additional companions beyond 55 astronomical units is ruled out.[8]
See also
- Alpha Caeli
- Alpha Trianguli, similar configuration
References
- ^ a b c "bet Cae". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-09.
{{cite web}}: CS1 maint: postscript (link) - ^ Bibcode:1973MNSSA..32...11C.
- ^ S2CID 119476992.
- ^ S2CID 16080025.
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ S2CID 53666672.
- ^ ISSN 0035-8711
- ^ S2CID 118723455.
