AS 314
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scutum |
| Right ascension | 18h 39m 26.10612s[2] |
| Declination | −13° 50′ 47.1892″[2] |
| Apparent magnitude (V) | 9.85[3] |
| Characteristics | |
| Spectral type | Protoplanetary nebula[4] |
| U−B color index | +0.12[3] |
| B−V color index | +0.89[3] |
| Variable type | cLBV[5]
|
| Details | |
| Luminosity | 3200[4] L☉ |
| Temperature | 10,200[7] K |
HIP 91477, 2MASS J18392610-1350470 | |
| Database references | |
| SIMBAD | data |
AS 314, also known as V452 Scuti, is a protoplanetary nebula[4] once believed to be a white hypergiant star or luminous blue variable located in the constellation of Scutum. It has an apparent magnitude of 9.85 and can be seen with small telescopes.
Characteristics
AS 314 was poorly studied until the year 2000, when Miroshnichenko et al. incorrectly estimated a distance for this star of around 10 kilo
solar radius (R☉), and an initial mass of 20 solar masses (M☉). It was also estimated to be losing 2 × 10−5 M☉ each year (in other words, 1 M☉ every 50,000 years) through a very strong stellar wind.[8]
AS 314 has an
dust.[8][9] However, it has not been classified as a bona fide luminous blue variable, but as a candidate.[5]
The Hipparcos parallax and proper motions are large and imply a much closer, and hence less luminous, star.[2] The Hipparcos measurement was later confirmed by the Gaia mission,[6] reclassifying AS 314 as post-AGB star.[4]
References
- ^ "The main OGLE Homepage". OGLE. Warsaw University. Retrieved 19 March 2022.
- ^ S2CID 18759600.
- ^ Bibcode:1985A&AS...61..387K.
- ^
- ^ S2CID 43688343.
- ^ .
- ^ van Genderen, A.M. (2001). "S Doradus variables in the Galaxy and the Magellanic Clouds". .
- ^ .
- .
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