All names: PG 1236+479, HS 1236+4754, SDSS J123905.03+473750.7, GSC2 N13003102489, LAMOST J123905.03+473750.7, PG1236+479, Gaia DR3 1543006141129419648, GALEX J123904.9+473750, TIC 115908231, 2MASS J12390505+4737509, Ton 96, USNO-B1.0 1376-00281063, Gaia EDR3 1543006141129419648, UBV M 43114, SDSS J123905.04+473750.7, Gaia DR2 1543006141129419648
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 39 05.02 (0.02) | 12 39 05.04 | 12 39 05.11 | 12 39 05.02 (0.04) | 12 39 05.04 (0.02) | 12 39 05.04 | |||
| Declination | 47 37 50.71 (0.02) | 47 37 50.79 | 47 37 51.08 | 47 37 50.71 (0.04) | 47 37 50.75 (0.03) | 47 37 50.78 | |||
| Spectral type | sdB | sdO | SDO | ||||||
| Effective temperature | [K] | 28400.0 (800) | 28475.0 (161) | ||||||
| log(g) | [cgs] | 5.55 (0.1) | 5.43 (0.03) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.58 (0.04) | 0.52 (0.07) | 0.52 (0.07) | 0.58 (0.04) | ||||
| Distance | [pc] | 1738.73 (126) | 1921.23 (259) | 1921.31 (259) | 1738.83 (126) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -12.67020385 (0.03) | -12.784 (0.07) | -12.78401216 (0.07) | -12.67 (0.03) | -14.9 | |||
| Proper motion (declination) | [mas/yr] | -2.300647496 (0.03) | -2.177 (0.08) | -2.176946957 (0.08) | -2.301 (0.03) | -3.5 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.37 (0.4) | ||||||||
| V magnitude | 15.63 (0.3) | ||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.22 (0.1) | 16.22 (0.1) | |||||||
| H magnitude | 16.09 (0.2) | 16.09 (0.2) | |||||||
| K magnitude | 15.72 | ||||||||
| u magnitude | 15.12 (0.005) | 15.12 (0.005) | 15.12 (0.005) | 15.09 (0.01) | |||||
| g magnitude | 15.28 (0.004) | 15.28 (0.004) | 15.28 (0.004) | 15.31 (0.01) | |||||
| r magnitude | 15.79 (0.004) | 15.79 (0.004) | 15.79 (0.004) | 15.78 (0.01) | |||||
| i magnitude | 16.12 (0.005) | 16.12 (0.005) | 16.12 (0.005) | 16.15 (0.02) | |||||
| z magnitude | 16.44 (0.009) | 16.44 (0.009) | 16.44 (0.009) | 16.45 (0.01) | |||||
| G magnitude | 15.55 (0.002) | 15.56 (0.001) | 15.56 | 15.55 (0.003) | |||||
| BP magnitude | 15.41 (0.002) | 15.34 (0.006) | 15.34 | ||||||
| RP magnitude | 15.83 (0.003) | 15.82 (0.003) | 15.82 | ||||||
| Pan g magnitude | 15.37 (0.003) | 15.37 (0.003) | |||||||
| Pan r magnitude | 15.80 (0.004) | 15.80 (0.004) | |||||||
| Pan i magnitude | 16.16 (0.003) | 16.16 (0.003) | |||||||
| Pan z magnitude | 16.44 (0.005) | 16.44 (0.005) | |||||||
| Pan y magnitude | 16.60 (0.005) | 16.60 (0.005) | |||||||
| E(B-V) | 0.018 | ||||||||
* 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.