All names: GALEX J122712.2+220237, SDSSJ122712.24+220237.4, Gaia DR2 3952802511547313920, Gaia DR3 3952802511547313920, WISEA J122712.21+220237.6, WISE J122712.21+220237.8, SDSS J122712.24+220237.4, USNO-B1.0 1120-00232291
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 12 27 12.24 | 12 27 12.25 (0.08) | ||
| Declination | 22 02 37.50 | 22 02 37.57 (0.07) | ||
| Spectral type | sdB+MS | sdB+? | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.19 (0.1) | 0.12 (0.1) | |
| Distance | [pc] | 5321.98 (3642) | 8583.69 (7287) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -6.857 (0.2) | -6.975 (0.1) | |
| Proper motion (declination) | [mas/yr] | -10.608 (0.2) | -10.531 (0.1) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 18.00 | |||
| V magnitude | ||||
| R magnitude | 17.80 | |||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 17.67 (0.01) | 17.67 (0.01) | ||
| g magnitude | 17.55 (0.005) | 17.55 (0.005) | ||
| r magnitude | 17.60 (0.006) | 17.60 (0.006) | ||
| i magnitude | 17.67 (0.007) | 17.67 (0.007) | ||
| z magnitude | 17.75 (0.02) | 17.73 (0.02) | ||
| G magnitude | 17.56 (0.001) | 17.53 (0.003) | ||
| BP magnitude | 17.58 (0.01) | |||
| RP magnitude | 17.35 (0.01) | |||
| Pan g magnitude | 17.59 (0.004) | |||
| Pan r magnitude | 17.62 (0.004) | |||
| Pan i magnitude | 17.68 (0.006) | |||
| Pan z magnitude | 17.75 (0.009) | |||
| Pan y magnitude | 17.79 (0.008) | |||
| E(B-V) | 0.017 | |||
* 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.