All names: GALEX J225218.4+221805, LAMOST J225218.36+221805.0, Gaia DR3 2836713031563656704, PG2249+220, PG 2249+220, UCAC4 562-137627, SDSS J225218.35+221804.3, Gaia DR2 2836713031563656704, LB 1153
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 52 18.40 | 22 52 18.36 (0.04) | ||
| Declination | 22 18 05.12 | 22 18 04.36 (0.04) | ||
| Spectral type | He-sdO | sdO | ||
| Effective temperature | [K] | 50635.0 (241) | ||
| log(g) | [cgs] | 6.18 (0.03) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.40 (0.1) | 0.31 (0.06) | |
| Distance | [pc] | 2471.58 (635) | 3223.73 (601) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.215 (0.2) | -0.991 (0.07) | |
| Proper motion (declination) | [mas/yr] | -3.393 (0.1) | -3.268 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.81 (0.05) | |||
| V magnitude | 16.08 (0.04) | |||
| R magnitude | 16.15 (0.5) | |||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 15.44 (0.005) | 15.44 (0.02) | ||
| g magnitude | 15.79 (0.004) | 15.78 (0.01) | ||
| r magnitude | 16.23 (0.004) | 16.26 (0.02) | ||
| i magnitude | 16.58 (0.005) | 16.66 (0.04) | ||
| z magnitude | 16.82 (0.01) | 16.86 (0.03) | ||
| G magnitude | 16.03 (0.002) | 16.01 (0.003) | ||
| BP magnitude | 15.82 (0.008) | |||
| RP magnitude | 16.25 (0.003) | |||
| Pan g magnitude | 15.86 (0.003) | |||
| Pan r magnitude | 16.24 (0.004) | |||
| Pan i magnitude | 16.59 (0.004) | |||
| Pan z magnitude | 16.86 (0.006) | |||
| Pan y magnitude | 17.04 (0.01) | |||
| E(B-V) | 0.053 | |||
* 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.