All names: Gaia DR3 225573267233289600, TIC 352908517, SDSS J040422.55+372432.3, 2MASS J04042256+3724324, LAMOSTJ040422.55+372432.2, Gaia DR2 225573267233289600, LAMOST J040422.55+372432.2, UCAC4 638-015763
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 04 04 22.56 | 04 04 22.56 (0.05) | ||
| Declination | 37 24 32.21 | 37 24 32.36 (0.03) | ||
| Spectral type | sdOB | sdOB | ||
| Effective temperature | [K] | 34095.0 (237) | ||
| log(g) | [cgs] | 5.91 (0.05) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.80 (0.07) | 0.92 (0.06) | |
| Distance | [pc] | 1250.94 (112) | 1084.25 (67) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.223 (0.1) | -1.936 (0.06) | |
| Proper motion (declination) | [mas/yr] | -7.178 (0.09) | -7.105 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.27 (0.06) | |||
| V magnitude | 16.14 (0.02) | |||
| R magnitude | 15.16 (0.9) | |||
| I magnitude | ||||
| J magnitude | 15.85 (0.07) | 15.85 (0.07) | ||
| H magnitude | 16.11 (0.2) | 16.11 (0.2) | ||
| K magnitude | 15.70 | |||
| u magnitude | 16.31 (0.006) | 16.31 (0.006) | ||
| g magnitude | 16.20 (0.004) | 16.20 (0.004) | ||
| r magnitude | 16.27 (0.004) | 16.27 (0.004) | ||
| i magnitude | 16.40 (0.005) | 16.40 (0.005) | ||
| z magnitude | 16.53 (0.008) | 16.53 (0.008) | ||
| G magnitude | 16.20 (0.0008) | 16.17 (0.003) | ||
| BP magnitude | 16.20 (0.004) | |||
| RP magnitude | 16.08 (0.003) | |||
| Pan g magnitude | 16.21 (0.002) | |||
| Pan r magnitude | 16.27 (0.004) | |||
| Pan i magnitude | 16.41 (0.004) | |||
| Pan z magnitude | 16.54 (0.007) | |||
| Pan y magnitude | 16.61 (0.006) | |||
| E(B-V) | 0.559 | |||
* 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.