All names: Gaia DR2 3921182824874389632, LBQS 1214+1448, PB 3921, SDSS J121725.90+143139.4, Gaia DR3 3921182824876067328, SDSS J121725.87+143139.3, SDSS J121725.90+143139.40, Gaia EDR3 3921182824876067328, USNO-B1.0 1045-00211092, SDSS J121725.87+143139.4
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Gaia DR2 | Stilism | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 17 25.90 (0.2) | 12 17 25.88 | 12 17 25.90 (0.3) | 12 17 25.90 | 12 17 25.86 (0.2) | |||||
| Declination | 14 31 39.40 (0.1) | 14 31 39.38 | 14 31 39.40 (0.2) | 14 31 39.40 | 14 31 39.48 (0.1) | |||||
| Spectral type | DC | DC | DC | DC | ||||||
| Effective temperature | [K] | 10000.0 (270) | 9701.0 (458) | |||||||
| log(g) | [cgs] | 6.50 (0.03) | 8.09 (0.08) | |||||||
| Mass | [M☉] | 0.635 (0.07) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 6.24 (0.2) | 6.43 (0.4) | 6.24 | 6.24 (0.2) | |||||
| Distance | [pc] | 160.30 (5) | 155.56 (11) | 160.30 | 160.30 (5) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 38.74228329 (0.2) | 38.41886288 (0.7) | 38.742 (0.2) | ||||||
| Proper motion (declination) | [mas/yr] | -4.84563748 (0.2) | -5.258896101 (0.3) | -4.846 (0.2) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 18.60 | |||||||||
| V magnitude | ||||||||||
| R magnitude | 18.90 | |||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 18.73 (0.02) | 18.73 (0.02) | 18.73 (0.02) | |||||||
| g magnitude | 18.55 (0.008) | 18.55 (0.01) | 18.55 (0.008) | |||||||
| r magnitude | 18.67 (0.009) | 18.67 (0.01) | 18.67 (0.009) | |||||||
| i magnitude | 18.82 (0.01) | 18.82 (0.01) | 18.82 (0.01) | |||||||
| z magnitude | 18.99 (0.03) | 18.99 (0.03) | 18.99 (0.03) | |||||||
| G magnitude | 18.60 (0.02) | 18.63 | 18.60 | 18.60 (0.003) | ||||||
| BP magnitude | 18.63 (0.02) | 18.59 | ||||||||
| RP magnitude | 18.51 (0.02) | 18.46 | ||||||||
| Pan g magnitude | 18.59 (0.009) | |||||||||
| Pan r magnitude | 18.68 (0.004) | |||||||||
| Pan i magnitude | 18.84 (0.02) | |||||||||
| Pan z magnitude | 18.99 (0.02) | |||||||||
| Pan y magnitude | 19.07 (0.03) | |||||||||
| E(B-V) | 0.011 | |||||||||
* 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.