All names: USNO-B1.0 0980-00704611, TIC 418831175, WISEA J214254.42+080525.1, Gaia DR3 2701893698904233216, PM J21429+0805, WISE J214254.41+080525.3, Gaia EDR3 2701893698904233216, NLTT 51908, SDSS J214254.44+080525.6, HIDDEN NAME WD 2140+078, LSPM J2142+0805, Gaia DR2 2701893698904233216, LP 578-24, J2142+0805, 21429+0805, 2MASS J21425448+0805272, WDJ214254.49+080527.35
| Parameter | Unit | Gaia EDR3 | O'Brien et al. 2024 | Caron et al. 2023 | Stilism | Holberg et al. 2016 | Limoges et al. 2015 | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 42 54.40 (0.07) | 21 42 54.40 | 21 42 54.49 (0.07) | ||||||
| Declination | 08 05 24.23 (0.08) | 08 05 24.23 | 08 05 27.35 (0.08) | ||||||
| Spectral type | DA | DA | DA | DA | DC: | DA | |||
| Effective temperature | [K] | 4819.0 (48) | 4825.0 (13) | 4830.0 (515) | 4830.0 (515) | 4871.0 (26) | |||
| log(g) | [cgs] | 7.73 (0.04) | 7.71 (0.008) | 8.00 (0) | 8.00 (0) | 7.75 (0.01) | |||
| Mass | [M☉] | 0.443 (0.02) | 0.42 (0.006) | 0.58 (0) | 0.58 (0.1) | 0.436 (0.01) | |||
| log(Luminosity) | [L☉] | -4.11 | |||||||
| Cooling age | [Gyr] | 3.5800 | 6.4000 | ||||||
| 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] | 33.45 (0.09) | 33.45 (0.09) | 33.45 (0.09) | 33.45 | 33.45 (0.09) | |||
| Distance | [pc] | 29.90 (0.08) | 29.90 (0.08) | 29.90 (0.08) | 24.20 (3) | 25.10 (4) | 29.90 | 29.90 (0.08) | |
| Composition | H | H | H | ||||||
| Proper motion (right ascension) | [mas/yr] | -81.20925807 (0.08) | -81.209 (0.08) | ||||||
| Proper motion (declination) | [mas/yr] | -194.8002847 (0.09) | -194.8 (0.09) | ||||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 18.00 | ||||||||
| V magnitude | 15.66 | ||||||||
| R magnitude | 15.60 | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.77 (0.03) | 15.77 | 15.77 (0.08) | ||||||
| H magnitude | 15.27 (0.03) | 15.27 | 15.27 (0.1) | ||||||
| K magnitude | 15.18 (0.03) | 15.18 | 15.18 (0.2) | ||||||
| u magnitude | 19.53 (0.03) | 19.53 (0.03) | |||||||
| g magnitude | 17.78 (0.006) | ||||||||
| r magnitude | 17.01 (0.005) | ||||||||
| i magnitude | 16.71 (0.005) | ||||||||
| z magnitude | 16.59 (0.009) | ||||||||
| G magnitude | 17.05 (0.01) | 17.05 | 17.05 (0.003) | ||||||
| BP magnitude | 17.57 (0.01) | ||||||||
| RP magnitude | 16.39 (0.006) | ||||||||
| Pan g magnitude | 17.67 (0.006) | ||||||||
| Pan r magnitude | 17.01 (0.003) | ||||||||
| Pan i magnitude | 16.75 (0.003) | ||||||||
| Pan z magnitude | 16.66 (0.005) | ||||||||
| Pan y magnitude | 16.60 (0.003) | ||||||||
| 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.