All names: 2MASS J22425244+0152215, LAMOST J224252.43+015221.5, PB 5136, PHL 384, Gaia DR3 2654793575707334784, uvby98 610160384, GALEX J224252.4+015222, Gaia EDR3 2654793575707334784, HS2240+0136, TIC 421995373, Gaia DR2 2654793575707334784, HS 2240+0136
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 22 42 52.44 (0.03) | 22 42 52.48 | 22 42 52.45 (0.03) | ||
| Declination | 01 52 21.16 (0.03) | 01 52 22.55 | 01 52 21.46 (0.03) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 31300.0 (800) | |||
| log(g) | [cgs] | 6.00 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.50 (0.04) | 1.43 (0.06) | 1.50 (0.04) | |
| Distance | [pc] | 665.69 (16) | 697.50 (27) | 665.69 (16) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -9.176 (0.04) | -9.176 (0.1) | -9.176 (0.04) | |
| Proper motion (declination) | [mas/yr] | -18.424 (0.04) | -18.518 (0.1) | -18.424 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.80 | ||||
| V magnitude | 14.10 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 14.96 (0.04) | 14.96 (0.04) | |||
| H magnitude | 15.13 (0.09) | 15.13 (0.09) | |||
| K magnitude | 15.09 (0.1) | 15.09 (0.1) | |||
| u magnitude | 14.03 (0.004) | ||||
| g magnitude | 14.58 (0.002) | ||||
| r magnitude | 14.64 (0.008) | ||||
| i magnitude | 14.92 (0.005) | ||||
| z magnitude | 15.23 (0.006) | ||||
| G magnitude | 14.42 (0.003) | 14.44 (0.0008) | 14.42 (0.003) | ||
| BP magnitude | 14.31 (0.004) | 14.27 (0.01) | |||
| RP magnitude | 14.64 (0.004) | 14.64 (0.003) | |||
| Pan g magnitude | 14.29 (0.006) | ||||
| Pan r magnitude | 14.66 (0.002) | ||||
| Pan i magnitude | 14.98 (0.002) | ||||
| Pan z magnitude | 15.24 (0.003) | ||||
| Pan y magnitude | 15.41 (0.004) | ||||
| E(B-V) | 0.058 | ||||
* 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.