All names: PM J13086+8502, 13086+8502, WDJ130841.20+850228.16, J1308+8502, Gaia DR2 1726678630833373824, CNS5 3234, PSO J197.1800+85.0403, G 256-7, GJ 3768, LP 8-46, Gaia EDR3 1726678630833373824, GEN# +9.80256007, WD 1309+853, G256-007, G256-7, LSPM J1308+8502, TIC 154903874, 2MASS J13084106+8502283, LP 7-226, NLTT 33249, Gaia DR3 1726678630833373824, EGGR 436, GALEX J130843.1+850226, USNO-B1.0 1750-00025127, WISEA J130842.93+850225.5, WD 1309+85, PLX 3031.01, GAT 1377
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | MWDD H | Gaia DR2 | Stilism | Holberg et al. 2016 | Ferrario et al. 2015 | Limoges et al. 2015 | Sion et al. 2014 | Giammichele et al. 2012 | Holberg et al. 2008 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 13 08 43.84 (0.03) | 13 08 43.76 (0.04) | 13 08 43.76 (0.04) | 13 08 41.04 | 13 08 43.84 | 13 08 41.19 (0.03) | 13 08 43.76 | 13 08 36.96 | ||||||||||||
| Declination | 85 02 24.15 (0.03) | 85 02 24.28 (0.03) | 85 02 24.28 (0.03) | 85 02 27.60 | 85 02 24.15 | 85 02 28.16 (0.03) | 85 02 24.28 | 85 02 39.48 | ||||||||||||
| Spectral type | DAH | DAP | DAP | DAP | DAP | DAP | DA | DAP | DAP9 | DAP | DAP | DA: | DA9P | DCP9 | ||||||
| Effective temperature | [K] | 5254.0 (28) | 5375.0 (17) | 5240.8 (19) | 5300.0 (25) | 5290.0 | 5440.0 (98) | 5600.0 | 5430.0 (135) | 5440.0 | 5440.0 (98) | 5316.0 (15) | ||||||||
| log(g) | [cgs] | 8.08 (0.02) | 8.16 (0.007) | 8.07 (0.01) | 8.12 (0.01) | 8.10 | 8.20 (0.03) | 8.19 (0.02) | 8.20 (0.03) | 8.11 (0.007) | ||||||||||
| Mass | [M☉] | 0.629 (0.01) | 0.681 (0.006) | 0.655 (0.01) | 0.645 | 0.71 (0.02) | 0.5 | 0.71 (0.02) | 0.71 (0.02) | 0.651 (0.006) | ||||||||||
| log(Luminosity) | [L☉] | -4.01 | -4.01 | |||||||||||||||||
| Cooling age | [Gyr] | 5.5000 | 5.4630 (0.2) | 5.3360 | 4.9900 | 5.4500 | ||||||||||||||
| 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] | 60.71 (0.03) | 60.71 (0.03) | 60.72 (0.04) | 60.72 (0.04) | 60.72 (0.04) | 60.72 (0.04) | 60.62 (1) | 60.70 (1) | 60.70 (1) | 55.40 | 60.71 | 60.71 (0.03) | 60.72 (0.04) | 54.50 (9) | |||||
| Distance | [pc] | 16.47 (0.008) | 16.47 (0.008) | 16.47 (0.01) | 16.47 (0.01) | 16.47 (0.01) | 16.47 (0.01) | 16.50 (0.3) | 16.50 (0.9) | 16.47 | 16.50 (0.3) | 18.05 | 16.47 | 16.47 (0.008) | 16.47 (0.01) | 18.35 (3) | ||||
| Composition | H | H | H | H | H | H | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 214.4302863 (0.04) | 214.2800149 (0.07) | 214.43 (0.04) | 214.2800149 | |||||||||||||||
| Proper motion (declination) | [mas/yr] | -250.7121185 (0.04) | -250.8320011 (0.06) | -250.712 (0.04) | -250.8320011 | |||||||||||||||
| Variability | ||||||||||||||||||||
| Magnetic | yes | yes | yes | yes | ||||||||||||||||
| Bd | [MG] | 4.9 | 4.9 (0.5) | |||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||||
| Binarity | ||||||||||||||||||||
| B magnitude | 16.77 | 16.76 | ||||||||||||||||||
| V magnitude | 15.99 | 15.97 | ||||||||||||||||||
| R magnitude | 15.90 | |||||||||||||||||||
| I magnitude | ||||||||||||||||||||
| J magnitude | 14.69 (0.03) | 14.69 (0.03) | 14.69 | 14.69 (0.03) | ||||||||||||||||
| H magnitude | 14.46 (0.06) | 14.46 (0.06) | 14.46 | 14.46 (0.06) | ||||||||||||||||
| K magnitude | 14.34 (0.09) | 14.34 (0.09) | 14.34 | 14.34 (0.09) | ||||||||||||||||
| u magnitude | ||||||||||||||||||||
| g magnitude | 16.31 (0.005) | |||||||||||||||||||
| r magnitude | 15.76 (0.02) | |||||||||||||||||||
| i magnitude | 15.58 (0.003) | |||||||||||||||||||
| z magnitude | 15.52 (0.006) | |||||||||||||||||||
| G magnitude | 15.81 (0.004) | 15.82 | 15.82 | 15.81 | 15.81 (0.003) | 15.82 | ||||||||||||||
| BP magnitude | 16.23 (0.004) | 16.24 | 16.24 | |||||||||||||||||
| RP magnitude | 15.23 (0.002) | 15.24 | 15.24 | |||||||||||||||||
| Pan g magnitude | 16.31 (0.005) | 16.31 (0.005) | 16.31 (0.005) | |||||||||||||||||
| Pan r magnitude | 15.76 (0.02) | 15.76 (0.02) | 15.76 (0.02) | |||||||||||||||||
| Pan i magnitude | 15.58 (0.003) | 15.58 (0.003) | 15.58 (0.003) | |||||||||||||||||
| Pan z magnitude | 15.52 (0.006) | 15.52 (0.006) | 15.52 (0.006) | |||||||||||||||||
| Pan y magnitude | 15.49 (0.005) | 15.49 (0.005) | 15.49 (0.005) | |||||||||||||||||
| 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.