SSSPM J1549-3544
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 48m 40.23s[1] |
| Declination | −35° 44′ 25.5″[1] |
| Apparent magnitude (V) | 14.78[1] |
| Characteristics | |
| Spectral type | sdK5[1] |
| Astrometry | |
| Proper motion (μ) | RA: -591[2] mas/yr Dec.: -538 mas/yr |
| Absolute magnitude (MV) | 9.5 |
| Distance | ~350 Ly (~100 parsec) |
| Details | |
| Temperature | < 4500 K |
| Other designations | |
SSSPM J1549-3544, 2MASS J15484023-3544254. | |
| Database references | |
| SIMBAD | data |
SSSPM J1549-3544 is a star in the constellation Lupus with high proper motion. It was initially found to have high proper motion in a 2003 survey of images taken by the optical SuperCOSMOS Sky Surveys and by the near-infrared sky surveys 2MASS and DENIS. It was then thought to be a cool white dwarf close to the Sun.[2] However, more detailed spectroscopic observations in 2005 appear to show that it is not a white dwarf, but a high-velocity halo metal-poor subdwarf.[1]
References
- 1 2 3 4 5 SSSPM J1549-3544 Is Not a White Dwarf, J. Farihi, P. R. Wood, and B. Stalder, Astrophysical Journal 627, #1 (July 2005), pp. L41–L43.
- 1 2 The nearest cool white dwarf (d ~4 pc), the coolest M-type subdwarf (sdM9.5), and other high proper motion discoveries, R.-D. Scholz, I. Lehmann, I. Matute, and H. Zinnecker, Astronomy and Astrophysics 425 (Oct. 2004), pp. 519–527.
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