All names: Gaia EDR3 2690647825256267264, Gaia DR2 2690647825256267264, SDSSJ210823.60+010155.3, 2MASS J21082359+0101552, LAMOST J210823.59+010155.3, TIC 387373406, LAMOST J210823.59+010155.5, SDSS J210823.60+010155.39, SDSS J210823.60+010155.4, Gaia DR3 2690647825256267264, SDSS J210823.59+010155.3, SDSS J210823.60+010155.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 08 23.60 (0.07) | 21 08 23.60 | 21 08 23.60 | 21 08 23.60 (0.06) | 21 08 23.61 (0.07) | ||||
| Declination | 01 01 55.36 (0.04) | 01 01 55.36 | 01 01 55.30 | 01 01 55.36 (0.06) | 01 01 55.42 (0.04) | ||||
| Spectral type | sdB | sdB | sdB2He6 | ||||||
| Effective temperature | [K] | 23398.0 (1339) | 25993.0 (236) | ||||||
| log(g) | [cgs] | 5.01 (0.2) | 5.26 (0.03) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.56 (0.06) | 0.44 (0.08) | 0.44 (0.08) | 0.56 (0.06) | ||||
| Distance | [pc] | 1792.51 (205) | 2249.21 (381) | 2249.29 (381) | 1792.44 (205) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -10.41887249 (0.1) | -10.285 (0.1) | -10.28540209 (0.1) | -10.419 (0.1) | ||||
| Proper motion (declination) | [mas/yr] | -3.876881676 (0.06) | -4.073 (0.1) | -4.073072498 (0.1) | -3.877 (0.06) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.26 (0.1) | 16.36 (0.02) | |||||||
| H magnitude | 15.96 | 16.49 (0.03) | |||||||
| K magnitude | 17.09 | 16.50 (0.04) | |||||||
| u magnitude | 15.77 (0.005) | 15.77 (0.005) | 15.79 (0.02) | 15.77 (0.005) | |||||
| g magnitude | 15.76 (0.004) | 15.75 (0.004) | 15.77 (0.01) | 15.75 (0.004) | |||||
| r magnitude | 16.16 (0.005) | 16.15 (0.005) | 16.16 (0.008) | 16.15 (0.005) | |||||
| i magnitude | 16.43 (0.005) | 16.42 (0.005) | 16.41 (0.01) | 16.42 (0.005) | |||||
| z magnitude | 16.69 (0.009) | 16.66 (0.009) | 16.66 (0.02) | 16.66 (0.009) | |||||
| G magnitude | 15.97 (0.003) | 15.99 (0.002) | 15.99 | 15.97 (0.003) | |||||
| BP magnitude | 15.88 (0.003) | 15.85 (0.01) | 15.85 | ||||||
| RP magnitude | 16.13 (0.004) | 16.13 (0.005) | 16.13 | ||||||
| Pan g magnitude | 15.85 (0.002) | 15.85 (0.002) | |||||||
| Pan r magnitude | 16.17 (0.004) | 16.17 (0.004) | |||||||
| Pan i magnitude | 16.46 (0.002) | 16.46 (0.002) | |||||||
| Pan z magnitude | 16.67 (0.006) | 16.67 (0.006) | |||||||
| Pan y magnitude | 16.82 (0.007) | 16.82 (0.007) | |||||||
| E(B-V) | 0.051 | ||||||||
* 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.