All names: WG 7, Gaia DR3 4727581523318486912, L 175-34, BPS CS 22968-0019, L175-34, UCAC4 169-002755, WD 0308-565, WDJ030947.92-562349.41, BPM 17088, 2MASS J03094790-5623494, uvby98 600217088, Gaia EDR3 4727581523318486912, GSC 08495-00951, TIC 207200679, GEN# +6.00217088, WD 0308-56, GCRV 27423, Gaia DR2 4727581523318486912, HE 0308-5635, GALEX J030947.8-562346
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Bergeron et al. 2011 | Voss et al. 2007 | Petitclerc et al. 2005 | Wegner et al. 1987 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 03 09 48.21 (0.02) | 03 09 48.20 (0.03) | 03 09 48.21 | 03 09 47.92 (0.02) | 03 09 48.20 | 03 09 49.63 | ||||||
| Declination | -56 23 48.34 (0.02) | -56 23 48.38 (0.03) | -56 23 48.34 | -56 23 49.41 (0.02) | -56 23 48.38 | -56 22 40.08 | ||||||
| Spectral type | DB | DB | DB | DB3 | ||||||||
| Effective temperature | [K] | 23000.0 (2336) | 22849.0 | 23000.0 | 23684.0 (522) | |||||||
| log(g) | [cgs] | 8.04 (0.07) | 8.06 | 8.11 (0.006) | ||||||||
| Mass | [M☉] | 0.63 (0.04) | 0.639 | 0.666 (0.005) | ||||||||
| log(Luminosity) | [L☉] | -1.40 | ||||||||||
| Cooling age | [Gyr] | 0.0437 | ||||||||||
| log(H/He) | <-4.80 (3) | |||||||||||
| log(C/He) | -5.5 (0.3) | <-6 | ||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| log(N/He) | <-7.9 | |||||||||||
| log(O/He) | ||||||||||||
| log(Na/He) | ||||||||||||
| log(Mg/He) | ||||||||||||
| log(Al/He) | ||||||||||||
| log(Si/He) | <-8.4 | |||||||||||
| log(P/He) | <-8.7 | |||||||||||
| log(S/He) | <-7.5 | |||||||||||
| log(Cl/He) | <-7.8 | |||||||||||
| log(Sc/He) | ||||||||||||
| log(Ti/He) | ||||||||||||
| log(V/He) | <-7.9 | |||||||||||
| log(Cr/He) | <-7.9 | |||||||||||
| log(Mn/He) | ||||||||||||
| log(Fe/He) | <-7.9 | |||||||||||
| log(Co/He) | 7<-.5 | |||||||||||
| log(Ni/He) | <-6.7 | |||||||||||
| log(Cu/He) | ||||||||||||
| log(Zn/He) | ||||||||||||
| log(Ga/He) | ||||||||||||
| log(Ge/He) | ||||||||||||
| log(Sr/He) | ||||||||||||
| Parallax | [mas] | 20.18 (0.02) | 20.13 (0.03) | 20.18 | 20.18 (0.02) | 20.13 (0.03) | ||||||
| Distance | [pc] | 49.55 (0.05) | 49.67 (0.08) | 50.00 | 49.55 | 49.55 (0.05) | 49.67 (0.08) | |||||
| Composition | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 149.2613164 (0.03) | 149.2407431 (0.06) | 149.261 (0.03) | 149.2407431 | |||||||
| Proper motion (declination) | [mas/yr] | 66.80582633 (0.03) | 66.91887675 (0.05) | 66.806 (0.03) | 66.91887675 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 14.02 | 13.99 (0.01) | ||||||||||
| V magnitude | 14.07 | 14.14 (0.04) | ||||||||||
| R magnitude | 14.42 (0.06) | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | 14.60 (0.04) | |||||||||||
| H magnitude | 14.75 (0.07) | |||||||||||
| K magnitude | 14.82 (0.1) | |||||||||||
| u magnitude | ||||||||||||
| g magnitude | ||||||||||||
| r magnitude | ||||||||||||
| i magnitude | ||||||||||||
| z magnitude | ||||||||||||
| G magnitude | 14.10 (0.001) | 14.12 | 14.10 | 14.10 (0.003) | 14.12 | |||||||
| BP magnitude | 14.01 (0.001) | 13.98 | 13.98 | |||||||||
| RP magnitude | 14.28 (0.0009) | 14.28 | 14.28 | |||||||||
| Pan g magnitude | ||||||||||||
| Pan r magnitude | ||||||||||||
| Pan i magnitude | ||||||||||||
| Pan z magnitude | ||||||||||||
| Pan y magnitude | ||||||||||||
| 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.