All names: LAMOST J085754.65+381851.8, PG 0854+385, 2MASS J08575462+3818520, Gaia DR2 719606175420853888, SDSS J085754.65+381851.8, FBS 0854+385, FBS B 57, PG0854+385, KUV 345-38, KUV 08547+3830, Gaia EDR3 719604766671582464, UCAC4 642-044869, TIC 416841756, Gaia DR3 719606175420853888, WISE J085754.56+381850.7
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 08 57 46.83 (0.4) | 08 57 54.69 | 08 57 54.66 (0.04) | ||
| Declination | 38 18 28.83 (0.3) | 38 18 52.13 | 38 18 51.80 (0.03) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 31725.0 (967) | |||
| log(g) | [cgs] | 5.62 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 3.42 (0.5) | 0.66 (0.08) | 0.45 (0.05) | |
| Distance | [pc] | 292.36 (45) | 1509.21 (192) | 2208.97 (253) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.767 (0.5) | -3.045 (0.1) | -3.266 (0.05) | |
| Proper motion (declination) | [mas/yr] | -15.228 (0.4) | -4.686 (0.08) | -4.606 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.38 (0.04) | ||||
| V magnitude | 15.72 (0.01) | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.21 (0.1) | 16.21 (0.1) | |||
| H magnitude | 16.39 (0.2) | 16.39 (0.2) | |||
| K magnitude | 15.81 (0.2) | 15.81 (0.2) | |||
| u magnitude | 15.22 (0.004) | 15.22 (0.004) | |||
| g magnitude | 15.39 (0.004) | 15.39 (0.004) | |||
| r magnitude | 15.89 (0.005) | 15.89 (0.005) | |||
| i magnitude | 16.20 (0.005) | 16.20 (0.005) | |||
| z magnitude | 16.52 (0.008) | 16.52 (0.008) | |||
| G magnitude | 20.02 (0.005) | 15.68 (0.0007) | 15.66 (0.003) | ||
| BP magnitude | 20.08 (0.06) | 15.47 (0.005) | |||
| RP magnitude | 19.98 (0.09) | 15.92 (0.004) | |||
| Pan g magnitude | 15.48 (0.004) | ||||
| Pan r magnitude | 15.89 (0.003) | ||||
| Pan i magnitude | 16.25 (0.003) | ||||
| Pan z magnitude | 16.51 (0.003) | ||||
| Pan y magnitude | 16.70 (0.006) | ||||
| E(B-V) | 0.025 | ||||
* 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.