All names: USNO-B1.0 0281-00783386, Gaia DR2 6631915390382416256, L 158-53, GEN# +6.00211668, Gaia EDR3 6631915390382416256, NLTT 46820, LTT 7406, UCAC4 141-199460, WDJ184228.68-615153.66, BPM 11668, Gaia DR3 6631915390382416256, NSV 11181, 2MASS J18422866-6151537, WD 1837-619, WD 1837-61, LAWD 71, TIC 464341632, uvby98 986417120
| Parameter | Unit | Gaia EDR3 | O'Brien et al. 2024 | Gaia DR2 | Stilism | Weidemann and Koester 1995 | Wegner 1983c | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 42 28.06 (0.02) | 18 42 28.08 (0.03) | 18 42 28.06 | 18 42 28.68 (0.02) | 18 42 28.08 | 18 42 27.98 | |||||
| Declination | -61 51 58.61 (0.02) | -61 51 58.45 (0.03) | -61 51 58.61 | -61 51 53.66 (0.02) | -61 51 58.45 | -61 51 53.28 | |||||
| Spectral type | DC | DC: | DC | DC5 | |||||||
| Effective temperature | [K] | 9194.0 (87) | 8500.0 | 8500.0 | 8966.0 (42) | ||||||
| log(g) | [cgs] | 8.02 (0.02) | 7.96 (0.008) | ||||||||
| Mass | [M☉] | 0.59 (0.01) | 0.556 (0.006) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | -5 | -5 | |||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 38.98 (0.02) | 38.98 (0.02) | 38.92 (0.04) | 38.98 | 38.98 (0.02) | 38.92 (0.04) | 39.00 | |||
| Distance | [pc] | 25.66 (0.02) | 25.65 (0.01) | 25.69 (0.02) | 25.66 | 25.66 (0.02) | 25.69 (0.02) | 25.64 | |||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -276.5161076 (0.02) | -276.4922128 (0.05) | -276.516 (0.02) | -276.4922128 | ||||||
| Proper motion (declination) | [mas/yr] | -309.0585675 (0.02) | -309.1164011 (0.04) | -309.059 (0.02) | -309.1164011 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 14.91 (0.07) | ||||||||||
| V magnitude | 14.69 (0.03) | ||||||||||
| R magnitude | 14.72 (0.09) | ||||||||||
| I magnitude | |||||||||||
| J magnitude | 14.53 (0.04) | ||||||||||
| H magnitude | 14.54 (0.05) | ||||||||||
| K magnitude | 14.74 (0.1) | ||||||||||
| u magnitude | |||||||||||
| g magnitude | 14.74 (0.01) | ||||||||||
| r magnitude | 14.72 (0.01) | ||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 14.64 (0.001) | 14.66 | 14.64 | 14.64 (0.003) | 14.66 | ||||||
| BP magnitude | 14.70 (0.001) | 14.67 | 14.67 | ||||||||
| RP magnitude | 14.53 (0.001) | 14.54 | 14.54 | ||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.003 | ||||||||||
* 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.