All names: PG 1239+044, UCAC4 471-047296, LAMOST J124231.09+040643.7, Gaia EDR3 3704162319296853120, PG1239+044, Gaia DR2 3704162319296853120, 2MASS J12423104+0406437, GALEX J124231.0+040643, PB 4152, TIC 291109577, SDSS J124231.05+040643.8, SDSS J124231.05+040643.7, Ton 108, Gaia DR3 3704162319296853120
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 42 31.05 (0.05) | 12 42 31.06 | 12 42 31.05 (0.05) | ||
| Declination | 04 06 43.83 (0.02) | 04 06 44.07 | 04 06 43.84 (0.02) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 34180.0 (60) | |||
| log(g) | [cgs] | 5.87 (0.02) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.70 (0.05) | 0.74 (0.07) | 0.70 (0.05) | |
| Distance | [pc] | 1428.16 (111) | 1354.28 (125) | 1428.16 (111) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.94 (0.07) | -2.809 (0.2) | -2.94 (0.07) | |
| Proper motion (declination) | [mas/yr] | -0.835 (0.06) | -1.128 (0.07) | -0.835 (0.06) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.28 (0.04) | ||||
| V magnitude | 15.49 (0.05) | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.18 (0.1) | 16.17 (0.01) | |||
| H magnitude | 16.18 (0.3) | 16.29 (0.01) | |||
| K magnitude | 16.16 | 16.42 (0.04) | |||
| u magnitude | 14.91 (0.004) | 14.91 (0.004) | |||
| g magnitude | 15.22 (0.003) | 15.22 (0.003) | |||
| r magnitude | 15.72 (0.005) | 15.72 (0.005) | |||
| i magnitude | 16.08 (0.005) | 16.08 (0.005) | |||
| z magnitude | 16.41 (0.009) | 16.41 (0.009) | |||
| G magnitude | 15.47 (0.003) | 15.48 (0.0005) | 15.47 (0.003) | ||
| BP magnitude | 15.31 (0.003) | 15.26 (0.006) | |||
| RP magnitude | 15.77 (0.004) | 15.77 (0.002) | |||
| Pan g magnitude | 15.28 (0.005) | ||||
| Pan r magnitude | 15.73 (0.003) | ||||
| Pan i magnitude | 16.10 (0.003) | ||||
| Pan z magnitude | 16.40 (0.005) | ||||
| Pan y magnitude | 16.61 (0.005) | ||||
| E(B-V) | 0.022 | ||||
* 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.