All names: G171-27, EGGR 507, WD 2352+401, 2MASS J23545624+4027301, USNO 578, Gaia DR2 1921351390779081600, WD 2352+40, TIC 291688847, Gaia DR3 1921351390779081600, CNS5 5903, LSPM J2354+4027, USNO-B1.0 1304-00508460, PM J23549+4027, Gaia EDR3 1921351390779081600, PSO J358.7353+40.4565, UCAC2 45911334, NLTT 58386, uvby98 980171027, WDJ235456.28+402729.54, LHS 4043, G 171-27, 23549+4027, J2354+4027, PLX 5776.02
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Coutu et al. 2019 | Blouin et al. 2019 | Gaia DR2 | Subasavage et al. 2017 | Stilism | Limoges et al. 2015 | Dufour et al. 2005 | Bergeron et al. 2001 | Bergeron et al. 1997 | Weidemann and Koester 1995 | Wegner and Yackovich 1984 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 54 56.57 (0.02) | 23 54 56.56 (0.02) | 23 54 56.28 | 23 54 56.56 (0.02) | 23 54 56.26 | 23 54 56.57 | 23 54 56.28 (0.02) | 23 54 56.56 | 23 54 56.21 | ||||||||||||
| Declination | 40 27 21.06 (0.01) | 40 27 21.32 (0.02) | 40 27 29.54 | 40 27 21.32 (0.02) | 40 27 02.05 | 40 27 21.06 | 40 27 29.54 (0.01) | 40 27 21.32 | 40 27 47.52 | ||||||||||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ5 | DQ6 | |||||||
| Effective temperature | [K] | 7902.0 (60) | 7609.0 (26) | 7926.9 (30) | 7555.0 (232) | 7545.0 (55) | 7820.0 (180) | 7200.0 (723) | 7710.0 (200) | 8260.0 (260) | 8290.0 (250) | 7500.0 | 7750.0 | 7584.0 (19) | |||||||
| log(g) | [cgs] | 8.03 (0.02) | 7.94 (0.005) | 8.04 (0.01) | 7.93 | 7.93 (0.02) | 8.04 (0.04) | 7.65 (0.2) | 7.78 (0.3) | 7.99 (0.2) | 8.01 (0.2) | 7.94 (0.004) | |||||||||
| Mass | [M☉] | 0.596 (0.01) | 0.542 (0.004) | 0.5321 | 0.536 (0.01) | 0.6 (0.03) | 0.39 (0.1) | 0.45 (0.1) | 0.57 (0.1) | 0.58 (0.1) | 0.539 (0.003) | ||||||||||
| log(Luminosity) | [L☉] | -3.30 (0.05) | -3.24 | -3.17 (0.1) | -3.18 (0.1) | ||||||||||||||||
| Cooling age | [Gyr] | 1.2200 | 1.1700 | 1.1440 (0.03) | 1.2400 (0.1) | 1.0700 (0.3) | 1.3700 (0.4) | 0.6400 | |||||||||||||
| log(H/He) | <-3.3 | ||||||||||||||||||||
| log(C/He) | -5.69 | -5.7503 (0.04) | -5.86 | -5.14 | -5.19 (0.2) | -5.5 | -5.0 | ||||||||||||||
| log(Ca/He) | |||||||||||||||||||||
| log(Ca/H) | |||||||||||||||||||||
| log(N/He) | <-8 | ||||||||||||||||||||
| log(O/He) | <-8 | ||||||||||||||||||||
| 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] | 45.29 (0.02) | 45.29 (0.02) | 45.22 (0.03) | 45.22 (0.03) | 45.22 | 45.22 (0.03) | 45.22 (0.03) | 45.12 (0.4) | 38.70 (6) | 38.70 (6) | 38.70 (6) | 45.29 | 45.29 (0.02) | 45.22 (0.03) | 38.90 (38) | |||||
| Distance | [pc] | 22.08 (0.01) | 22.08 (0.01) | 22.11 (0.01) | 22.12 (0.02) | 22.12 (0.02) | 22.12 (0.01) | 22.12 (0.02) | 22.16 (0.2) | 25.80 (4) | 25.84 (4) | 25.84 (4) | 22.08 | 22.08 (0.01) | 22.12 (0.02) | 25.71 (25) | |||||
| Composition | He | He | He | He | He | He | He | He | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 209.741017 (0.02) | 209.8546276 (0.04) | 209.741 (0.02) | 209.8546276 | ||||||||||||||||
| Proper motion (declination) | [mas/yr] | -530.2599455 (0.02) | -530.1924303 (0.03) | -530.26 (0.02) | -530.1924303 | ||||||||||||||||
| Variability | |||||||||||||||||||||
| Magnetic | |||||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||||
| Binarity | |||||||||||||||||||||
| B magnitude | 15.13 | 15.13 | 15.13 | 15.28 | |||||||||||||||||
| V magnitude | 14.94 | 14.94 | 14.94 | ||||||||||||||||||
| R magnitude | 14.75 | 14.75 | 15.00 | ||||||||||||||||||
| I magnitude | 14.66 | 14.62 | 14.62 | ||||||||||||||||||
| J magnitude | 14.57 (0.004) | 14.58 (0.04) | 14.58 (0.04) | 14.57 | 14.57 | 14.58 (0.04) | |||||||||||||||
| H magnitude | 14.45 (0.06) | 14.45 (0.06) | 14.45 (0.06) | 14.52 | 14.52 | 14.45 (0.06) | |||||||||||||||
| K magnitude | 14.51 (0.09) | 14.51 (0.09) | 14.51 (0.09) | 14.50 | 14.50 | 14.51 (0.09) | |||||||||||||||
| u magnitude | |||||||||||||||||||||
| g magnitude | 14.97 (0.004) | ||||||||||||||||||||
| r magnitude | 14.90 (0.002) | ||||||||||||||||||||
| i magnitude | 14.98 (0.006) | ||||||||||||||||||||
| z magnitude | 15.10 (0.002) | ||||||||||||||||||||
| G magnitude | 14.85 (0.001) | 14.87 | 14.87 | 14.85 | 14.85 (0.003) | 14.87 | |||||||||||||||
| BP magnitude | 14.96 (0.001) | 14.95 | 14.95 | ||||||||||||||||||
| RP magnitude | 14.65 (0.001) | 14.66 | 14.66 | ||||||||||||||||||
| Pan g magnitude | 14.97 (0.005) | 14.97 (0.004) | 14.97 (0.004) | ||||||||||||||||||
| Pan r magnitude | 14.90 (0.002) | 14.90 (0.002) | 14.90 (0.002) | ||||||||||||||||||
| Pan i magnitude | 14.98 (0.006) | 14.98 (0.006) | 14.97 (0.006) | ||||||||||||||||||
| Pan z magnitude | 15.10 (0.002) | 15.10 (0.002) | 15.10 (0.002) | ||||||||||||||||||
| Pan y magnitude | 15.16 (0.01) | 15.16 (0.01) | 15.16 (0.01) | ||||||||||||||||||
| 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.