All names: TIC 248807072, J2056-0450, vB 11, LHS 3601, NLTT 50189, WDJ205647.78-045039.54, WD 2054-05, 2E 2054.1-0502, Gaia EDR3 6913810483611035776, 2E 4431, GEN# +6.00118508, EGGR 202, USNO 565, GJ 812 B, 2MASS J20564771-0450395, Ross 193B, WD 2054-050, PSO J314.2013-04.8449, VB 11, CNS5 5178, ** LDS 6420B, Gaia DR2 6913810483611035776, LTT 18508, GEN# +6.00108292B, CSI-05-20541 2, LTT 8292B, Gaia DR3 6913810483611035776, WDS J20568-0449B
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | Blouin et al. 2019 | Gaia DR2 | Tremblay et al. 2017 | Stilism | Holberg et al. 2016 | Sion et al. 2014 | Giammichele et al. 2012 | Holberg et al. 2008 | Bergeron et al. 2001 | Bergeron et al. 1997 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 56 48.62 (0.04) | 20 56 48.59 (0.05) | 20 56 47.76 | 20 56 48.62 | 20 56 47.78 (0.04) | 20 56 48.59 | 20 56 42.94 | ||||||||||||
| Declination | -04 50 43.11 (0.02) | -04 50 43.00 (0.03) | -04 50 38.40 | -04 50 43.11 | -04 50 39.54 (0.02) | -04 50 43.00 | -04 50 25.44 | ||||||||||||
| Spectral type | DC | DC | DC | DC | DC | DC10.9 | DC | DC | DC | DC: | DC10 | DC9 | |||||||
| Effective temperature | [K] | 4416.0 (27) | 4383.0 (21) | 4365.0 (35) | 4340.0 (80) | 4491.0 (42) | 4620.0 | 4340.0 (83) | 4620.0 (40) | 4630.0 (50) | 4502.0 (13) | ||||||||
| log(g) | [cgs] | 7.88 (0.02) | 7.86 (0.009) | 7.85 (0.02) | 7.84 (0.1) | 7.62 (0.1) | 8.09 (0.1) | 8.09 (0.1) | 7.95 (0.006) | ||||||||||
| Mass | [M☉] | 0.506 (0.01) | 0.494 (0.007) | 0.491 (0.01) | 0.5 (0.05) | 0.37 (0.06) | 0.62 (0.08) | 0.63 (0.08) | 0.545 (0.005) | ||||||||||
| log(Luminosity) | [L☉] | -4.11 | -4.24 (0.07) | -4.24 (0.07) | |||||||||||||||
| Cooling age | [Gyr] | 6.9900 | 6.5000 (0.3) | 5.9100 | 4.2700 | 7.4900 (0.6) | 8.3300 (1) | ||||||||||||
| 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] | 61.76 (0.05) | 61.76 (0.05) | 61.75 (0.07) | 61.75 (0.07) | 61.75 (0.07) | 62.15 (0.5) | 59.53 (3) | 56.56 (4) | 58.61 (3) | 64.60 (5) | 64.60 (5) | 61.76 | 61.76 (0.05) | 61.75 (0.07) | 71.00 | |||
| Distance | [pc] | 16.19 (0.01) | 16.19 (0.01) | 16.19 (0.02) | 16.19 (0.02) | 16.19 (0.02) | 16.09 (0.1) | 16.80 (0.9) | 17.05 | 17.70 (1) | 17.06 | 15.48 (1) | 15.48 (1) | 16.19 | 16.19 (0.01) | 16.19 (0.02) | 14.08 | ||
| Composition | H | H | H | H | He | He | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 776.2923656 (0.06) | 776.3548923 (0.1) | 776.292 (0.06) | 776.3548923 | ||||||||||||||
| Proper motion (declination) | [mas/yr] | -223.117118 (0.04) | -222.9393825 (0.07) | -223.117 (0.04) | -222.9393825 | ||||||||||||||
| Variability | |||||||||||||||||||
| Magnetic | |||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||
| Binarity | WDMS | WDMS | yes | ||||||||||||||||
| B magnitude | 17.89 | 17.89 | 17.89 | 17.81 | |||||||||||||||
| V magnitude | 16.69 (0.05) | 16.68 | 16.69 | 16.69 | 16.69 | 16.68 | |||||||||||||
| R magnitude | 16.03 | 16.03 | 16.03 | ||||||||||||||||
| I magnitude | 15.37 | 15.37 | 15.37 | ||||||||||||||||
| J magnitude | 14.73 (0.08) | 14.73 (0.08) | 14.82 | 14.82 | 14.82 | 14.73 (0.08) | |||||||||||||
| H magnitude | 14.56 (0.1) | 14.56 (0.1) | 14.61 | 14.61 | 14.61 | 14.56 (0.1) | |||||||||||||
| K magnitude | 14.33 (0.1) | 14.33 (0.1) | 14.54 | 14.54 | 14.54 | 14.33 (0.1) | |||||||||||||
| u magnitude | |||||||||||||||||||
| g magnitude | 17.17 (0.01) | ||||||||||||||||||
| r magnitude | 16.32 (0.004) | ||||||||||||||||||
| i magnitude | 15.94 (0.005) | ||||||||||||||||||
| z magnitude | 15.82 (0.0008) | ||||||||||||||||||
| G magnitude | 16.35 (0.004) | 16.36 | 16.35 | 16.35 (0.003) | 16.36 | ||||||||||||||
| BP magnitude | 16.95 (0.004) | 16.97 | 16.97 | ||||||||||||||||
| RP magnitude | 15.61 (0.003) | 15.62 | 15.62 | ||||||||||||||||
| Pan g magnitude | 17.17 (0.01) | 17.17 (0.01) | 17.17 (0.01) | ||||||||||||||||
| Pan r magnitude | 16.32 (0.004) | 16.32 (0.004) | 16.32 (0.004) | ||||||||||||||||
| Pan i magnitude | 15.94 (0.005) | 15.94 (0.005) | 15.95 (0.005) | ||||||||||||||||
| Pan z magnitude | 15.82 (0.0008) | 15.82 (0.0008) | 15.82 (0.001) | ||||||||||||||||
| Pan y magnitude | 15.75 (0.007) | 15.75 (0.007) | 15.75 (0.007) | ||||||||||||||||
| E(B-V) | 0.000 | ||||||||||||||||||
* 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.