All names: UCAC2 35940899, Balloon 111617001, Ton 109, Gaia DR2 3928420360164984320, PG1240+120, Pul -3 1000053, SDSS J124231.40+114400.8, LAMOST J124231.39+114401.0, 2MASS J12423139+1144012, UCAC4 509-053349, GALEX J124231.4+114401, RMB 110, ULAS J124231.39+114400.8, GPM 190.630886+11.733797, Balloon 111819006, Balloon 80405004, Gaia DR3 3928420360164984320, PG 1240+120, FAUST 3394, TIC 390629798, SDSS J124231.39+114400.9, GSC 00878-00340, [BFA97] 167
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 12 42 31.42 | 12 42 31.40 (0.05) | ||
| Declination | 11 44 01.66 | 11 44 00.96 (0.03) | ||
| Spectral type | He-sdO | sdOC | ||
| Effective temperature | [K] | 50848.0 (235) | ||
| log(g) | [cgs] | 6.10 (0.03) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.16 (0.07) | 0.28 (0.05) | |
| Distance | [pc] | 6289.31 (2943) | 3546.10 (666) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -7.796 (0.1) | -7.812 (0.07) | |
| Proper motion (declination) | [mas/yr] | -12.67 (0.08) | -12.44 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.50 (0.06) | |||
| V magnitude | 15.75 (0.06) | |||
| R magnitude | 16.09 (0.08) | |||
| I magnitude | ||||
| J magnitude | 16.30 (0.1) | 16.44 (0.01) | ||
| H magnitude | 16.49 (0.3) | 16.54 (0.02) | ||
| K magnitude | 16.62 | 16.69 (0.05) | ||
| u magnitude | 15.02 (0.004) | 15.07 (0.04) | ||
| g magnitude | 15.43 (0.003) | 15.43 (0.02) | ||
| r magnitude | 15.94 (0.004) | 15.95 (0.02) | ||
| i magnitude | 16.30 (0.004) | 16.33 (0.03) | ||
| z magnitude | 16.66 (0.009) | 16.69 (0.02) | ||
| G magnitude | 15.71 (0.0009) | 15.70 (0.003) | ||
| BP magnitude | 15.49 (0.008) | |||
| RP magnitude | 16.00 (0.002) | |||
| Pan g magnitude | 15.54 (0.003) | |||
| Pan r magnitude | 15.96 (0.002) | |||
| Pan i magnitude | 16.34 (0.007) | |||
| Pan z magnitude | 16.62 (0.004) | |||
| Pan y magnitude | 16.82 (0.007) | |||
| E(B-V) | 0.024 | |||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.