21467-0010 BNG 2
21h 46m 40.46s -00° 10' 24.1" P.A. 251.00 sep 31.6 mag 7.49,18.85 Sp M4+T8.5
| Coord 2000 | 21467-0010 | Discov num | BNG 2 | Comp | Coord arcsec 2000 | 21 46 40.46 -00 10 24.1 | |||||
| Date first | 2007 | Date last | 2009 | Obs | 3 | ||||||
| Pa first | 253 | Pa last | 250.5 | P.A. Now (θ) | 250.5° | ||||||
| Sep first | 32.2 | Sep last | 31.64 | Sep. Now (ρ) | 31.64" | ||||||
| Mag pri | 7.49 | Mag sec | 18.85 | delta mag (ΔM) | 11.36 | Spectral class | M4+T8.5 (red/brown dwarf) | ||||
| Pri motion ra | +765 | Sec motion ra | |||||||||
| Pri motion dec | -497 | Sec motion dec | |||||||||
| Notes | N V K (See Notes, Proper motion indicates physical, K-band or other infrared magnitudes) | ||||||||||
OTHER CATALOGS AND DESIGNATIONS
| Constellation | Aquarius |
WDS 21467-0010 BNG 2 : NOTES
| discov_num | notes | refcode |
| BNG 2 | Burningham et al. (2009) determine that ULAS J214638.83-001038.7 is a | Bng2009 |
| CPM companion to the high proper motion M4 dwarf Wolf 940. Spectral | ||
| type of the companion is T8.5 +/- 0.5. Given the distance to Wolf 940 | ||
| = 12.50 +0.75/-0.67 pc, the 32" angular separation corresponds to a | ||
| projected separation of 400 +/- 22 au. Mass of the companion is 20-32 | ||
| Mjup, Teff 570 +/- 25K, radius 0.094 +/- 0.004 Rsun. Observations | ||
| using Keck laser guide star AO indicated no evidence of any close | ||
| companion to the T8 companion. JHK photometry of the primary is from | ||
| 2MASS. | TMA2003 |
REFERENCES
| refcode | metd | author | reference |
| Bng2009 | C+ j | Burningham, B., Pinfield, D.J., Leggett, S.K., Tinney, C.G., Liu, M., Homeier, D., | 2009MNRAS.395.1237B |
| Bng2009 | +E2 | West, A.A., Day-Jones, A., Huelamo, N., Dupuy, T.J., Zhang, Z., Murray, D. et al. | |
| Bng2009 | +Xr | MNRAS 395, 1237, 2009 | |
| TMA2003 | E2 j | 2MASS Catalog | . |
| TMA2003 | 2MASS Point Src Cat., 2003 all-sky release (http://pegasus.phast.umass.edu/) | ||
| TMA2003 | (Note: 2MASS photometry also added by cataloguer to 2MASS astrometry published | ||
| TMA2003 | under other references.) | ||
| TMA2003 | Thurgood Marshall High School |
WDS HISTORIC DATA
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 21467-0010 | BNG 2 | 2007 | 1 | 253 | 32.2 | 7.49 | 18.85 | M4 T8.5 | N K | 214640.47-001025.4 | |
| 21467-0010 | BNG 2 | 2009 | 3 | 251 | 31.6 | 7.49 | 18.85 | M4+T8.5 | NV K | 214640.46-001024.1 | |
| 21467-0010 | BNG 2 | 2010 | 4 | 250 | 30.3 | 7.49 | 18.85 | M4+T8.5 | NV K | 214640.46-001024.1 |
If you need more information about this double, apply for a data request form to the WDS.
WDS 21467-0010 BNG 2 : VISUAL OBSERVATIONS REPORTS
WDS 21467-0010 BNG 2 : MEASURES
WDS 21467-0010 : VIRTUAL EYEPIECE
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WDS 21467-0010 : ALADIN DSS IMAGE @
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