All names: L7-44, UCAC4 015-004912, GSC 09530-00946, Gaia DR2 5765364850325338880, uvby98 620022001, TIC 451533898, UBV M 43536, WISE J173255.89-871004.0, L 7-44, WDJ173254.95-871002.55, WD 1708-871, JL 1, WISEA J173255.81-871004.1, WD 1708-87, Gaia EDR3 5765364850325338880, 2MASS J17325492-8710024, GEN# +6.20022001, Gaia DR3 5765364850325338880, BPM 921
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Bergeron et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 32 56.45 (0.03) | 17 32 56.40 (0.04) | 17 32 56.45 | 17 32 54.94 (0.03) | 17 32 56.40 | 17 33 28.82 | |||
| Declination | -87 10 04.89 (0.02) | -87 10 04.82 (0.04) | -87 10 04.89 | -87 10 02.55 (0.02) | -87 10 04.82 | -87 10 49.44 | |||
| Spectral type | DB | DB | DB | DB | |||||
| Effective temperature | [K] | 23980.0 (1686) | 22066.0 (452) | ||||||
| log(g) | [cgs] | 8.05 (0.06) | 8.01 (0.009) | ||||||
| Mass | [M☉] | 0.64 (0.03) | 0.609 (0.007) | ||||||
| log(Luminosity) | [L☉] | -1.33 | |||||||
| Cooling age | [Gyr] | 0.0355 | |||||||
| log(H/He) | <-4.69 (2) | ||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| log(N/He) | |||||||||
| log(O/He) | |||||||||
| log(Na/He) | |||||||||
| log(Mg/He) | |||||||||
| log(Al/He) | |||||||||
| log(Si/He) | |||||||||
| log(P/He) | |||||||||
| log(S/He) | |||||||||
| log(Cl/He) | |||||||||
| log(Sc/He) | |||||||||
| log(Ti/He) | |||||||||
| log(V/He) | |||||||||
| log(Cr/He) | |||||||||
| log(Mn/He) | |||||||||
| log(Fe/He) | |||||||||
| log(Co/He) | |||||||||
| log(Ni/He) | |||||||||
| log(Cu/He) | |||||||||
| log(Zn/He) | |||||||||
| log(Ga/He) | |||||||||
| log(Ge/He) | |||||||||
| log(Sr/He) | |||||||||
| Parallax | [mas] | 14.44 (0.03) | 14.42 (0.05) | 14.44 | 14.44 (0.03) | 14.42 (0.05) | |||
| Distance | [pc] | 69.24 (0.1) | 69.34 (0.2) | 58.00 | 69.24 | 69.24 (0.1) | 69.34 (0.2) | ||
| Composition | He | ||||||||
| Proper motion (right ascension) | [mas/yr] | 69.79395959 (0.03) | 69.7144802 (0.06) | 69.794 (0.03) | 69.7144802 | ||||
| Proper motion (declination) | [mas/yr] | -146.1643957 (0.03) | -146.292596 (0.08) | -146.164 (0.03) | -146.292596 | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 14.64 (0.01) | ||||||||
| V magnitude | 14.38 | 14.70 (0.01) | |||||||
| R magnitude | 15.04 (0.04) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.28 (0.06) | ||||||||
| H magnitude | 15.29 (0.1) | ||||||||
| K magnitude | 15.46 (0.2) | ||||||||
| u magnitude | |||||||||
| g magnitude | 14.59 (0.01) | ||||||||
| r magnitude | 14.89 (0.03) | ||||||||
| i magnitude | 15.14 (0.1) | ||||||||
| z magnitude | |||||||||
| G magnitude | 14.74 (0.002) | 14.76 | 14.74 | 14.74 (0.003) | 14.76 | ||||
| BP magnitude | 14.64 (0.002) | 14.60 | 14.60 | ||||||
| RP magnitude | 14.92 (0.001) | 14.92 | 14.92 | ||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.004 | ||||||||
* 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.