WD 1658+440
All names: 2MASS J16594844+4401038, RE J1659+440, H 1659+44, TIC 115613388, PG, EUVE J1659+44.0, [ZEH2003] RX J1659.8+4400 1, WDJ165948.42+440104.04, RE J165949+440105, Gaia DR2 1358301480583401728, RX J1659.8+4401, J1659+4401, FBS B 376, 2RE J1659+440, Balloon 93600001, GSC 03083-01079, 1RXS J165948.2+440059, Gaia EDR3 1358301480583401728, PG 1658+440, Balloon 83600001, FBS 1658+440, 2RE J165948+440136, 1658+440, Gaia DR3 1358301480583401728, 2EUVE J1659+44.0, GALEX J165948.3+440104, RX J1659.8+4400, SDSS J165948.41+440104.5, WD 1658+440, PG 1658+441
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Jewett et al. 2024 | O'Brien et al. 2024 | Hardy et al. 2023a | Kilic et al. 2020 | McCleery et al. 2020 | Leggett et al. 2018 | MWDD H | Gaia DR2 | Stilism | Holberg et al. 2016 | Ferrario et al. 2015 | Sion et al. 2014 | Gianninas et al. 2011 | Liebert et al. 2005 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 59 48.38 (0.02) | 16 59 48.38 (0.03) | 16 59 48.38 (0.03) | 16 59 48.24 | 16 59 48.38 | 16 59 48.42 (0.02) | 16 59 48.38 | 16 59 48.41 | ||||||||||||||
| Declination | 44 01 05.62 (0.03) | 44 01 05.57 (0.04) | 44 01 05.57 (0.04) | 44 01 01.20 | 44 01 05.62 | 44 01 04.04 (0.03) | 44 01 05.57 | 44 01 06.60 | ||||||||||||||
| Spectral type | DAH | DAH | DAH | DAH | DAH | DAH | DAP1.8 | DAP | DAP | DA | DAP1.7 | DA | DA | DAP1.6 | DAP2 | |||||||
| Effective temperature | [K] | 28170.0 (327) | 28170.0 (327) | 29613.0 (729) | 28956.9 (811) | 28169.0 (328) | 29909.3 (593) | 28475.0 (1396) | 27797.0 | 30510.0 (503) | 30510.0 (200) | 30510.0 | 31010.0 (503) | 30510.0 (598) | 29722.0 (322) | |||||||
| log(g) | [cgs] | 9.19 (0.009) | 9.18 | 9.23 (0.02) | 9.22 (0.1) | 9.19 (0.01) | 9.24 (0.02) | 9.20 (0.04) | 9.18 | 9.36 (0.09) | 9.72 (0.07) | 9.36 (0.09) | 9.23 (0.01) | |||||||||
| Mass | [M☉] | 1.272 (0.003) | 1.272 (0.003) | 1.284 (0.007) | 1.2828934188529597 (0.08) | 1.272 (0.003) | 1.275 (0.01) | 1.268 | 1.33 (0.03) | 1.31 (0.02) | 1.38 (0.06) | 1.31 (0.05) | 1.286 (0.003) | |||||||||
| log(Luminosity) | [L☉] | -1.91 | ||||||||||||||||||||
| Cooling age | [Gyr] | 0.2900 (0.01) | 0.2440 (0.04) | 0.2489 | 0.3200 | 0.3802 | ||||||||||||||||
| 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] | 31.59 (0.03) | 31.59 (0.03) | 31.65 (0.04) | 31.64 (0.5) | 31.65 (0.04) | 31.59 | 31.59 (0.03) | 31.65 (0.04) | 39.00 | ||||||||||||
| Distance | [pc] | 31.65 (0.03) | 31.66 (0.03) | 31.60 (0.04) | 31.61 (0.5) | 31.60 (0.04) | 27.43 (0.9) | 22.00 | 18.00 | 26.00 | 31.65 | 31.65 (0.03) | 31.60 (0.04) | 25.64 | ||||||||
| Composition | H | H | H | H | H | H | ||||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -31.68667805 (0.03) | -31.73829766 (0.06) | -31.687 (0.03) | -31.73829766 | |||||||||||||||||
| Proper motion (declination) | [mas/yr] | 98.73769004 (0.04) | 98.56698263 (0.07) | 98.738 (0.04) | 98.56698263 | |||||||||||||||||
| Variability | ||||||||||||||||||||||
| Magnetic | yes | yes | yes | yes | yes | |||||||||||||||||
| Bd | [MG] | 3.902572935250198 | 3.5 | 2.3 (0.2) | ||||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||||||
| Binarity | ||||||||||||||||||||||
| B magnitude | 14.30 | |||||||||||||||||||||
| V magnitude | 15.02 | 14.62 | 14.60 | |||||||||||||||||||
| R magnitude | ||||||||||||||||||||||
| I magnitude | ||||||||||||||||||||||
| J magnitude | 15.45 (0.06) | |||||||||||||||||||||
| H magnitude | 15.53 (0.1) | |||||||||||||||||||||
| K magnitude | 15.05 (0.2) | |||||||||||||||||||||
| u magnitude | 14.32 (0.004) | 14.32 (0.004) | 14.31 | |||||||||||||||||||
| g magnitude | 14.59 (0.004) | 14.59 (0.004) | 14.58 | |||||||||||||||||||
| r magnitude | 15.04 (0.004) | 15.04 (0.004) | 15.04 | |||||||||||||||||||
| i magnitude | 15.37 (0.005) | 15.37 (0.005) | 15.37 | |||||||||||||||||||
| z magnitude | 15.72 (0.007) | 15.72 (0.007) | 15.70 | |||||||||||||||||||
| G magnitude | 14.79 (0.002) | 14.80 | 14.80 | 14.79 | 14.79 (0.003) | 14.80 | ||||||||||||||||
| BP magnitude | 14.65 (0.002) | 14.61 | 14.61 | |||||||||||||||||||
| RP magnitude | 15.07 (0.002) | 15.06 | 15.06 | |||||||||||||||||||
| Pan g magnitude | 14.63 (0.003) | |||||||||||||||||||||
| Pan r magnitude | 15.03 (0.003) | |||||||||||||||||||||
| Pan i magnitude | 15.37 (0.003) | |||||||||||||||||||||
| Pan z magnitude | 15.67 (0.003) | |||||||||||||||||||||
| Pan y magnitude | 15.86 (0.006) | |||||||||||||||||||||
| E(B-V) | 0.003 | |||||||||||||||||||||
* Constant surface field
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