All names: G111-71, GALEX J082001.2+383434, USNO-B1.0 1285-00177085, EGGR 58, Gaia EDR3 908364559240386944, WDS J08201+3834B, NLTT 19311, PSO J125.0046+38.5754, CSI+38-08167, SDSS J082001.30+383435.0, J0820+3834, WD 0816+38, IDS 08135+3853 B, WIRED J082001.30+383434.9, WDJ082001.34+383435.52, GCRV 59549, TIC 18783115, CCDM J08201+3835B, G 111-71, Gaia DR3 908364559240386944, LSPM J0820+3834W, 08200+3834W, KUV 08167+3844, UBV 7965, 2MASS J08200137+3834364, SDSS J082001.31+383435.0, SDSS J082001.30+383434.9, Gaia DR2 908364559240386944, ** GIC 80B, USNO 309, PM J08200+3834W, WD 0816+387
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Blouin et al. 2019 | MWDD H | Gaia DR2 | Bedard et al. 2017 | Stilism | Limoges et al. 2015 | Gianninas et al. 2011 | Tremblay et al. 2011 | Bergeron et al. 2001 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 20 01.09 (0.05) | 08 20 01.31 | 08 20 01.09 (0.07) | 08 20 01.09 | 08 20 01.34 (0.05) | 08 20 01.09 | 08 20 01.31 | 08 20 01.73 | 08 20 01.31 | ||||||||||||||
| Declination | 38 34 31.43 (0.04) | 38 34 35.00 | 38 34 31.55 (0.06) | 38 34 31.43 | 38 34 35.52 (0.04) | 38 34 31.55 | 38 34 35.00 | 38 34 42.96 | 38 34 35.02 | ||||||||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA | DA | DA | DA | DA6.5 | DA | DA_auto | DAZ | DA | DA | ||||||
| Effective temperature | [K] | 7598.0 (35) | 7591.0 (29) | 7598.0 (36) | 7550.0 (65) | 7555.0 | 7544.0 (123) | 7750.0 (154) | 7700.0 (114) | 7590.0 (20) | 7570.0 (190) | 7825.0 (72) | 8001.0 (17) | 7457.0 (18) | |||||||||
| log(g) | [cgs] | 8.04 (0.008) | 8.04 (0.007) | 8.04 (0.008) | 8.03 (0.02) | 8.03 | 8.10 (0.09) | 8.27 (0.1) | 8.07 (0.07) | 8.13 (0.03) | 8.19 (0.1) | 8.11 (0.01) | 8.53 (0.03) | 7.95 (0.03) | |||||||||
| Mass | [M☉] | 0.62 (0.007) | 0.619 (0.006) | 0.617 (0.007) | 0.614 (0.01) | 0.61 | 0.57 (0.2) | 0.77 (0.09) | 0.64 (0.04) | 0.68 (0.02) | 0.71 (0.09) | 0.659 (0.01) | 0.567 (0.01) | ||||||||||
| log(Luminosity) | [L☉] | -3.44 | -3.43 (0.09) | ||||||||||||||||||||
| Cooling age | [Gyr] | 1.3500 | 1.3110 (0.05) | 1.2960 | 1.5136 | 1.6700 (0.5) | |||||||||||||||||
| 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] | 22.47 (0.07) | 22.41 (0.09) | 22.41 (0.09) | 22.41 (0.09) | 25.20 (2) | 25.20 (2) | 22.47 | 22.47 (0.07) | 22.41 (0.09) | 19.00 (4) | ||||||||||||
| Distance | [pc] | 44.50 (0.1) | 44.62 (0.2) | 44.63 (0.2) | 44.63 (0.2) | 39.70 (4) | 39.70 (6) | 45.00 | 39.68 (4) | 44.50 | 44.50 (0.1) | 44.63 (0.2) | 52.63 (11) | ||||||||||
| Composition | H | H | H | H | H | H | H | H | |||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -185.9904809 (0.06) | -186.148725 (0.1) | -185.99 (0.06) | -186.149 | -189.1 | |||||||||||||||||
| Proper motion (declination) | [mas/yr] | -255.9780602 (0.05) | -256.039293 (0.1) | -255.978 (0.05) | -256.039 | -260.7 | |||||||||||||||||
| Variability | NOV | ||||||||||||||||||||||
| Magnetic | |||||||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||||||
| Binarity | |||||||||||||||||||||||
| B magnitude | 16.81 | 16.94 | |||||||||||||||||||||
| V magnitude | 16.51 | ||||||||||||||||||||||
| R magnitude | 16.29 | 16.40 | |||||||||||||||||||||
| I magnitude | 16.07 | ||||||||||||||||||||||
| J magnitude | 15.92 (0.01) | 16.07 (0.1) | 15.87 | 16.07 (0.1) | |||||||||||||||||||
| H magnitude | 15.83 (0.2) | 15.83 (0.2) | 15.72 | 15.83 (0.2) | |||||||||||||||||||
| K magnitude | 15.58 (0.2) | 15.58 (0.2) | 15.73 | 15.58 (0.2) | |||||||||||||||||||
| u magnitude | 17.05 (0.008) | 17.06 (0.008) | 17.05 (0.008) | 17.05 (0.008) | 17.03 (0.02) | 17.03 | 17.04 (0.02) | ||||||||||||||||
| g magnitude | 16.58 (0.005) | 16.58 (0.006) | 16.58 (0.005) | 16.61 (0.02) | 16.61 | 16.61 (0.02) | |||||||||||||||||
| r magnitude | 16.48 (0.005) | 16.47 (0.002) | 16.48 (0.005) | 16.50 (0.01) | 16.50 | 16.49 (0.01) | |||||||||||||||||
| i magnitude | 16.46 (0.006) | 16.49 (0.002) | 16.46 (0.006) | 16.47 (0.008) | 16.47 | 16.47 (0.01) | |||||||||||||||||
| z magnitude | 16.53 (0.009) | 16.56 (0.003) | 16.53 (0.009) | 16.54 (0.01) | 16.54 | 16.53 (0.01) | |||||||||||||||||
| G magnitude | 16.43 (0.007) | 16.45 | 16.43 | 16.43 (0.003) | 16.45 | ||||||||||||||||||
| BP magnitude | 16.59 (0.007) | 16.56 | 16.56 | ||||||||||||||||||||
| RP magnitude | 16.16 (0.004) | 16.16 | 16.16 | ||||||||||||||||||||
| Pan g magnitude | 16.58 (0.007) | 16.58 (0.006) | 16.58 (0.006) | ||||||||||||||||||||
| Pan r magnitude | 16.47 (0.002) | 16.47 (0.002) | 16.48 (0.002) | ||||||||||||||||||||
| Pan i magnitude | 16.49 (0.002) | 16.49 (0.002) | 16.49 (0.002) | ||||||||||||||||||||
| Pan z magnitude | 16.56 (0.003) | 16.56 (0.002) | 16.56 (0.002) | ||||||||||||||||||||
| Pan y magnitude | 16.60 (0.006) | 16.60 (0.005) | 16.60 (0.005) | ||||||||||||||||||||
| 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.