2MASS J15404342−5101357
15h 40m 43.537s, −51° 01′ 35.968″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Norma |
| Right ascension | 15h 40m 43.537s[1] |
| Declination | −51° 01′ 35.968″[1] |
| Apparent magnitude (V) | 15.26[2] |
| Characteristics | |
| Evolutionary stage | main-sequence star[2]
|
| Spectral type | M7V[2] |
| Apparent magnitude (J) | 8.96[3] |
| Absolute bolometric magnitude (Mbol) | 12.81[2] |
| Details[2] | |
| Mass | 0.090±0.010 M☉ |
| Luminosity | 0.000603 L☉ |
| Temperature | 2621±100 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
  2M1540 Location of 2M1540 in the constellation Norma | |
2MASS J15404341−5101357 (abbreviated 2M1540) is a
Discovery
Its discovery was announced in 2014 by Kirkpatrick et al.[6] and independently by Pérez Garrido et al.[2]
Kirkpatrick and colleagues found a few thousand new high proper motion objects under the AllWISE program of study of images, taken by Wide-field Infrared Survey Explorer (WISE). 2M1540 was one of these high proper motion objects. They named it WISEA J154045.67-510139.3 and assigned it spectral type M6.[6]
Pérez Garrido and colleagues were looking for high proper motion sources in the 2MASS–WISE cross-match. They named it 2MASS J154043.42-510135.7 (2M1540 for short) and classified it as an M7.0±0.5 dwarf.[2]
Since the trigonometric distance of 2M1540 agreed with its spectrophotometric distances, computed for a single object, it was concluded that it is not an equal-mass binary.[2]
