All names: TIC 246977331, Gaia DR3 99836961472298752, GALEX J022401.3+215650, Gaia EDR3 99836961472298752, SDSS J022401.26+215650.0, WD 0221+217, PG0221+217, 2MASS J02240129+2156500, Gaia DR2 99836961472298752, PG 0221+217, LAMOST J022401.26+215650.1
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 02 24 01.26 (0.04) | 02 24 01.29 | 02 24 01.27 (0.04) | ||
| Declination | 21 56 49.87 (0.03) | 21 56 50.04 | 21 56 50.18 (0.03) | ||
| Spectral type | He-sdOB | sdB | |||
| Effective temperature | [K] | 37010.0 (370) | |||
| log(g) | [cgs] | 5.86 (0.06) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.77 (0.04) | 0.63 (0.07) | 0.77 (0.04) | |
| Distance | [pc] | 1296.68 (74) | 1588.06 (164) | 1296.68 (74) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -3.251 (0.05) | -3.213 (0.1) | -3.251 (0.05) | |
| Proper motion (declination) | [mas/yr] | -19.111 (0.04) | -18.93 (0.1) | -19.111 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.62 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.23 (0.1) | 16.23 (0.1) | |||
| H magnitude | 16.07 (0.2) | 16.07 (0.2) | |||
| K magnitude | 15.78 | ||||
| u magnitude | 15.32 (0.005) | 15.34 (0.01) | |||
| g magnitude | 15.52 (0.004) | 15.52 (0.02) | |||
| r magnitude | 15.88 (0.004) | 15.88 (0.02) | |||
| i magnitude | 16.17 (0.005) | 16.17 (0.01) | |||
| z magnitude | 16.43 (0.009) | 16.44 (0.02) | |||
| G magnitude | 15.67 (0.003) | 15.68 (0.001) | 15.67 (0.003) | ||
| BP magnitude | 15.58 (0.004) | 15.52 (0.02) | |||
| RP magnitude | 15.82 (0.006) | 15.83 (0.006) | |||
| Pan g magnitude | 15.57 (0.004) | ||||
| Pan r magnitude | 15.86 (0.003) | ||||
| Pan i magnitude | 16.17 (0.002) | ||||
| Pan z magnitude | 16.41 (0.002) | ||||
| Pan y magnitude | 16.55 (0.006) | ||||
| E(B-V) | 0.088 | ||||
* 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.