All names: NLTT 53618, J2221-0408, GALEX J222144.1-040859, Gaia EDR3 2626677723354947968, WDJ222143.97-040900.26, ** LDS 4960B, SDSS J222144.21-040900.0, SDSS J222144.22-040900.0, LP 700-4, Gaia DR3 2626677723354947968, Gaia DR2 2626677723354947968, WDS J22217-0409B
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 21 44.38 (0.06) | 22 21 44.37 | 22 21 44.38 | 22 21 43.97 (0.06) | 22 21 44.37 | ||||||
| Declination | -04 08 59.77 (0.07) | -04 08 59.79 | -04 08 59.77 | -04 09 00.27 (0.07) | -04 08 59.79 | ||||||
| Spectral type | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 8775.0 (52) | 8195.0 (39) | 8768.0 (46) | 9084.0 (130) | ||||||
| log(g) | [cgs] | 7.89 (0.01) | 7.72 (0.03) | 7.90 (0.03) | 7.97 (0.03) | ||||||
| Mass | [M☉] | 0.536 (0.009) | 0.444 (0.02) | 0.537 (0.02) | 0.581 (0.02) | ||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.7500 | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(C/H) | |||||||||||
| log(N/H) | |||||||||||
| log(O/H) | |||||||||||
| log(Na/H) | |||||||||||
| log(Mg/H) | |||||||||||
| log(Al/H) | |||||||||||
| log(Si/H) | |||||||||||
| log(P/H) | |||||||||||
| log(S/H) | |||||||||||
| log(Sc/H) | |||||||||||
| log(Ti/H) | |||||||||||
| log(Cr/H) | |||||||||||
| log(Mn/H) | |||||||||||
| log(Fe/H) | |||||||||||
| log(Ni/H) | |||||||||||
| Parallax | [mas] | 16.51 (0.07) | 16.59 (0.4) | 16.59 (0.4) | 16.51 | 16.51 (0.07) | 16.59 (0.4) | ||||
| Distance | [pc] | 60.57 (0.3) | 60.28 (1) | 60.28 (1) | 60.57 | 60.57 (0.3) | 60.28 (1) | ||||
| Composition | H | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 384.4506898 (0.08) | 383.8412593 (0.6) | 384.451 (0.08) | 383.8412593 | ||||||
| Proper motion (declination) | [mas/yr] | 31.24747502 (0.09) | 30.76633148 (0.8) | 31.247 (0.09) | 30.76633148 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.90 (0.01) | ||||||||||
| H magnitude | 15.81 (0.02) | ||||||||||
| K magnitude | 15.76 (0.03) | ||||||||||
| u magnitude | 16.85 (0.03) | 16.85 (0.008) | 16.85 (0.008) | ||||||||
| g magnitude | 16.43 (0.004) | 16.43 (0.004) | |||||||||
| r magnitude | 16.45 (0.004) | 16.45 (0.004) | |||||||||
| i magnitude | 16.54 (0.005) | 16.54 (0.005) | |||||||||
| z magnitude | 16.68 (0.01) | 16.68 (0.01) | |||||||||
| G magnitude | 16.38 (0.004) | 16.40 | 16.38 | 16.38 (0.003) | 16.40 | ||||||
| BP magnitude | 16.46 (0.004) | 16.43 | 16.43 | ||||||||
| RP magnitude | 16.22 (0.01) | 16.21 | 16.21 | ||||||||
| Pan g magnitude | 16.44 (0.004) | 16.44 (0.004) | |||||||||
| Pan r magnitude | 16.44 (0.002) | 16.44 (0.002) | |||||||||
| Pan i magnitude | 16.54 (0.003) | 16.54 (0.003) | |||||||||
| Pan z magnitude | 16.66 (0.005) | 16.66 (0.006) | |||||||||
| Pan y magnitude | 16.71 (0.01) | 16.71 (0.01) | |||||||||
| E(B-V) | 0.001 | ||||||||||
* 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.