All names: TIC 274677205, GALEX J170530.8+480310, UCAC4 691-056727, 1704+481A, ** SDK 1B, EGGR 576, SDSS J170530.98+480309.9, HIDDEN NAME WD 1704+481A, Gaia EDR3 1408135749896103936, WD 1704+481.1, Gaia DR3 1408135749896103936, Sanduleak A, ** SLN 83B, PM J17055+4803E, WD 1704+481A, WDS J17055+4803B, WDS J17054+4803B, 17055+4803E, WDJ170530.97+480310.27, Gaia DR2 1408135749896103936, J1705+4803, 1SWASP J170530.69+480311.4, 2MASS J17053095+4803104
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Kilic et al. 2020 | McCleery et al. 2020 | Leggett et al. 2018 | Gaia DR2 | Stilism | Limoges et al. 2015 | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 05 31.00 (0.02) | 17 05 30.99 (0.02) | 17 05 30.99 (0.02) | 17 05 31.00 | 17 05 30.97 (0.02) | 17 05 30.99 | 17 05 30.50 | |||||||||
| Declination | 48 03 09.14 (0.02) | 48 03 09.18 (0.03) | 48 03 09.18 (0.03) | 48 03 09.14 | 48 03 10.27 (0.02) | 48 03 09.18 | 48 03 07.20 | |||||||||
| Spectral type | DA | DA | DA | DA | DA3.7 | DA | DA | DA | DA3.6 | DA4 | ||||||
| Effective temperature | [K] | 13544.0 (98) | 14224.0 (201) | 13545.0 (98) | 14135.2 (116) | 13452.0 (804) | 14120.0 (292) | 14170.0 (294) | 14381.0 (98) | |||||||
| log(g) | [cgs] | 8.04 (0.005) | 8.08 (0.02) | 8.04 (0.005) | 8.08 (0.01) | 8.09 (0.04) | 8.09 (0.05) | 8.08 (0.05) | 8.10 (0.006) | |||||||
| Mass | [M☉] | 0.633 (0.004) | 0.659 (0.01) | 0.633 (0.005) | 0.66 (0.04) | 0.66 (0.03) | 0.66 (0.03) | 0.671 (0.005) | ||||||||
| log(Luminosity) | [L☉] | -2.28 | ||||||||||||||
| Cooling age | [Gyr] | 0.3090 (0.06) | ||||||||||||||
| 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] | 25.35 (0.02) | 25.35 (0.02) | 25.34 (0.03) | 26.21 (0.5) | 25.34 (0.03) | 25.35 | 25.35 (0.02) | 25.34 (0.03) | |||||||
| Distance | [pc] | 39.45 (0.03) | 39.45 (0.03) | 39.46 (0.04) | 38.15 (0.8) | 39.46 (0.04) | 39.50 (1) | 40.00 | 39.45 | 39.45 (0.03) | 39.46 (0.04) | |||||
| Composition | H | H | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 15.09006496 (0.02) | 15.02552194 (0.05) | 15.09 (0.02) | 15.02552194 | |||||||||||
| Proper motion (declination) | [mas/yr] | -70.50702091 (0.02) | -70.57269665 (0.06) | -70.507 (0.02) | -70.57269665 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | yes | |||||||||||||||
| B magnitude | 13.87 (0.09) | |||||||||||||||
| V magnitude | 13.80 (0.01) | |||||||||||||||
| R magnitude | ||||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 14.73 (0.04) | |||||||||||||||
| H magnitude | 14.80 (0.07) | |||||||||||||||
| K magnitude | 15.17 (0.2) | |||||||||||||||
| u magnitude | 14.77 (0.004) | 14.76 (0.004) | 14.76 | |||||||||||||
| g magnitude | 14.40 (0.004) | 14.38 (0.003) | 14.40 | |||||||||||||
| r magnitude | 14.66 (0.004) | 14.64 (0.003) | 14.66 | |||||||||||||
| i magnitude | 14.90 (0.004) | 14.88 (0.003) | 14.91 | |||||||||||||
| z magnitude | 15.15 (0.005) | 15.14 (0.005) | 15.16 | |||||||||||||
| G magnitude | 14.53 (0.001) | 14.54 | 14.54 | 14.53 | 14.53 (0.003) | 14.54 | ||||||||||
| BP magnitude | 14.50 (0.001) | 14.49 | 14.49 | |||||||||||||
| RP magnitude | 14.61 (0.001) | 14.61 | 14.61 | |||||||||||||
| Pan g magnitude | 14.43 (0.004) | |||||||||||||||
| Pan r magnitude | 14.68 (0.003) | |||||||||||||||
| Pan i magnitude | 14.93 (0.002) | |||||||||||||||
| Pan z magnitude | 15.15 (0.002) | |||||||||||||||
| Pan y magnitude | 15.27 (0.006) | |||||||||||||||
| E(B-V) | 0.005 | |||||||||||||||
* 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.