2MASS J18352154–3123385
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| 2MASS J18352154-3123385[1] | |
| Right ascension | 18h 35m 21.543s |
| Declination | –31° 23′ 38.53″ |
| Apparent magnitude (V) | 12.5 |
| 2MASS J18352205-3123421[2] | |
| Right ascension | 18h 35m 22.050s |
| Declination | –31° 23′ 42.19″ |
| Apparent magnitude (V) | 13.0 |
| Characteristics | |
| 2MASS J18352154-3123385 | |
| Spectral type | M6.5V |
| Apparent magnitude (J) | 8.652 |
| Apparent magnitude (H) | 8.097 |
| Apparent magnitude (K) | 7.803 |
| Characteristics | |
| 2MASS J18352205−3123421 | |
| Spectral type | M8V |
| Apparent magnitude (J) | 9.438 |
| Apparent magnitude (H) | 8.815 |
| Apparent magnitude (K) | 8.533 |
| Details dex | |
| 2MASS J18352205−3123421 | |
| Other designations | |
1RXS J183520.9−312327, PM J18353-3123W, LP 923-18 | |
| Database references | |
| SIMBAD | data |
2MASS J18352154−3123385, often shortened to be 2MASS J1835, is a
spectral type M6.5 and M8. They orbit each other in 1,400-1,800 years, and reached their closest point in mid-1968 assuming a constant proper motion. During their closest approach, they were separated by less than 0.1 arcsecond
, compared to their current separation of 2 arcseconds.
Despite the fact that A and B are magnitude 12.5 and 13, respectively, their vicinity to the Earth was not noticed until 2015 due to the fact that it is in front of a relatively dense star field less than 15 degrees away from the Galactic Center.[citation needed]
2MASS J1835A may be a flare star, due to many similar low-mass stars known to flare. It has not been observed to flare directly by 2015, however.
A 19th-magnitude star at 18h 35m 22.76s −31° 23′ 27.7″ has been seen in the vicinity, with a similar
spectral type
.
See also
Notes
periastron, but rather the date of the closest separation between 2MASS J1835A and B.
References
- ^ "2MASS J18352154-3123385". SIMBAD. Retrieved 21 December 2015.
- ^ "2MASS J18352205-3123421". SIMBAD. Retrieved 21 December 2015.
- ^ URAT South Parallax Results Table 5. New Nearby Star Discoveries URAT South Epoch Data
- ^ .
- ^ Trumpeting M dwarfs with CONCH-SHELL: a catalogue of nearby cool host-stars for habitable exoplanets and life supplementary data
- S2CID 118435904.
- ^ Kirkpatrick, J. D. "Discoveries from a Near-infrared Proper Motion Survey using Multi-epoch 2MASS Data (full text table)". IOPscience. Institute of Physics. Retrieved 21 December 2015.
