All names: SDSS J172119.37+374538.59, SDSS J172119.37+374538.5, Gaia DR2 1340436718734428032, Gaia EDR3 1340436718734428032, Gaia DR3 1340436718734428032, GALEX J172119.3+374538, LAMOST J172119.36+374538.5, SDSSJ172119.36+374538.5, SDSS J172119.36+374538.6
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 21 19.36 (0.06) | 17 21 19.36 | 17 21 19.36 | 17 21 19.36 (0.08) | 17 21 19.36 (0.06) | ||||
| Declination | 37 45 38.60 (0.07) | 37 45 38.68 | 37 45 38.50 | 37 45 38.60 (0.1) | 37 45 38.74 (0.07) | ||||
| Spectral type | sdOB | sdO | sdO | ||||||
| Effective temperature | [K] | 37494.0 (913) | 36735.0 (375) | ||||||
| log(g) | [cgs] | 5.96 (0.1) | 5.60 (0.05) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.34 (0.08) | 0.34 (0.1) | 0.35 (0.1) | 0.34 (0.08) | ||||
| Distance | [pc] | 2958.11 (658) | 2898.55 (874) | 2898.55 (874) | 2957.70 (658) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -0.169029087 (0.08) | -0.243 (0.2) | -0.242561907 (0.2) | -0.169 (0.08) | ||||
| Proper motion (declination) | [mas/yr] | -8.605340834 (0.1) | -8.389 (0.2) | -8.388603106 (0.2) | -8.605 (0.1) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 17.31 (0.009) | 17.31 (0.009) | 17.31 (0.02) | 17.31 (0.009) | |||||
| g magnitude | 17.59 (0.005) | 17.59 (0.005) | 17.61 (0.01) | 17.59 (0.005) | |||||
| r magnitude | 18.05 (0.007) | 18.05 (0.007) | 18.05 (0.01) | 18.05 (0.007) | |||||
| i magnitude | 18.41 (0.009) | 18.41 (0.009) | 18.41 (0.01) | 18.41 (0.009) | |||||
| z magnitude | 18.69 (0.03) | 18.70 (0.03) | 18.69 (0.03) | 18.70 (0.03) | |||||
| G magnitude | 17.79 (0.008) | 17.82 (0.002) | 17.82 | 17.79 (0.003) | |||||
| BP magnitude | 17.67 (0.008) | 17.63 (0.01) | 17.63 | ||||||
| RP magnitude | 18.08 (0.01) | 18.06 (0.01) | 18.06 | ||||||
| Pan g magnitude | 17.62 (0.004) | 17.62 (0.004) | |||||||
| Pan r magnitude | 18.04 (0.005) | 18.04 (0.005) | |||||||
| Pan i magnitude | 18.38 (0.003) | 18.39 (0.003) | |||||||
| Pan z magnitude | 18.64 (0.01) | 18.64 (0.01) | |||||||
| Pan y magnitude | 18.83 (0.02) | 18.83 (0.02) | |||||||
| E(B-V) | 0.027 | ||||||||
* 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.