HD 3346
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Stern HD 3346 |
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| AladinLite | |||||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Andromeda | ||||||||||||||||
| Right ascension | 00 h 36 m 46.44 s | ||||||||||||||||
| declination | + 44 ° 29 ′ 18.9 ″ | ||||||||||||||||
| Apparent brightness | 5.14 likes | ||||||||||||||||
| Typing | |||||||||||||||||
| B − V color index | +1.60 | ||||||||||||||||
| U − B color index | +1.97 | ||||||||||||||||
| Spectral class | K5 III | ||||||||||||||||
| Variable star type | SRS | ||||||||||||||||
| Astrometry | |||||||||||||||||
| Radial velocity | (−33.3 ± 0.2) km / s | ||||||||||||||||
| parallax | (4.95 ± 0.19) mas | ||||||||||||||||
| distance | (660 ± 25) ly (202 ± 8) pc |
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| Visual absolute brightness M vis | −1.2 mag | ||||||||||||||||
| Proper movement | |||||||||||||||||
| Rec. Share: | (−36.31 ± 0.21) mas / a | ||||||||||||||||
| Dec. portion: | (+31.96 ± 0.18) mas / a | ||||||||||||||||
| Physical Properties | |||||||||||||||||
| Effective temperature | 4350 K | ||||||||||||||||
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Other names and catalog entries |
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HD 3346 , variable name V428 Andromedae , is a giant star in the constellation Andromeda, about 700 light years from Earth . With an apparent magnitude of 5.14 mag, it can only be seen with the naked eye under optimal conditions.
Possible companion
At the beginning of the 1980s it was found that the radial speed of HD 3346 varied with a period of around 600 days, which was attributed to the presence of an accompanying object. According to speculation, this fluctuation could be caused by a companion with a minimum mass of about 60 Jupiter's masses and a semi-major axis of about 2.5 AU .
In addition, a variation of the radial velocity with a period of a few to a few dozen days was also found in 1996. This could be explained with an object with at least 10 Jupiter masses and a major semi-axis of 0.2 to 0.4 AU. But it could also be the result of other causes, such as acoustic pulsations.
The existence of companions around HD 3346 has not yet been confirmed.
Web links
- Extrasolar Visions ( Memento from June 24, 2011 in the Internet Archive )
Individual evidence
- ↑ a b V428 and. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed December 2, 2018 .
- ↑ a b Hipparcos catalog (ESA 1997)
- ↑ a b Bright Star Catalog
- ↑ V0428 am. In: VSX. AAVSO, accessed December 2, 2018 .
- ↑ Pulkovo radial velocities for 35493 HIP stars
- ↑ roughly estimated from apparent brightness and distance
- ^ Hipparcos, the New Reduction (van Leeuwen, 2007)