HG 8-7
All names: GEN# +5.20258007, G 8-8, PM J04045+2508, GJ 159.1, LSPM J0404+2508, 1SWASP J040434.12+250851.8, NLTT 12460, UBV M 42475, GEN# +9.80008008, UBV 3978, Gaia DR3 66144699680456320, 2MASS J04043412+2508517, CSI+25-04016, uvby98 600001240, 04045+2508, UBV M 42230, G8-8, UBV M 41476, GALEX J040434.1+250850, HG 8-7, LP 357-134, USNO-B1.0 1151-00049804, EGGR 28, WDJ040434.13+250851.68, WD 0401+250, TIC 348798660, PLX 896.01, Gaia EDR3 66144699680456320, Cl Melotte 25 225, LB 2140, LTT 11335, GEN# +6.00001240, GCRV 54734, LB 1240, USNO 12, WD 0401+25, Gaia DR2 66144699680456320
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | McCleery et al. 2020 | MWDD H | Gaia DR2 | Bedard et al. 2017 | Stilism | Limoges et al. 2015 | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 04 04 34.29 (0.03) | 04 04 34.28 (0.05) | 04 04 34.28 (0.05) | 04 04 34.29 | 04 04 34.13 (0.03) | 04 04 34.28 | 04 04 34.03 | ||||||||
| Declination | 25 08 48.22 (0.02) | 25 08 48.33 (0.02) | 25 08 48.33 (0.02) | 25 08 48.22 | 25 08 51.69 (0.02) | 25 08 48.33 | 25 09 03.60 | ||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA3.9 | DA4 | ||||||
| Effective temperature | [K] | 12319.0 (154) | 12378.2 (51) | 12209.0 | 12482.0 (191) | 12610.0 (203) | 12790.0 (208) | 12213.0 (80) | |||||||
| log(g) | [cgs] | 8.04 (0.01) | 8.05 (0.006) | 8.03 | 8.10 (0.05) | 8.03 (0.05) | 8.06 (0.05) | 8.03 (0.005) | |||||||
| Mass | [M☉] | 0.63 (0.009) | 0.625 | 0.71 (0.1) | 0.63 (0.03) | 0.64 (0.03) | 0.625 (0.004) | ||||||||
| log(Luminosity) | [L☉] | -2.44 | |||||||||||||
| Cooling age | [Gyr] | 0.3729 | |||||||||||||
| 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] | 37.77 (0.03) | 37.77 (0.03) | 37.69 (0.05) | 37.69 (0.05) | 37.00 (2) | 37.77 | 37.77 (0.03) | 37.69 (0.05) | 36.00 (3) | |||||
| Distance | [pc] | 26.47 (0.02) | 26.48 (0.02) | 26.54 (0.04) | 26.54 (0.04) | 26.80 (2) | 27.00 (2) | 27.00 | 26.47 | 26.47 (0.02) | 26.54 (0.04) | 27.78 (2) | |||
| Composition | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 134.6071451 (0.04) | 134.7526443 (0.08) | 134.607 (0.04) | 134.7526443 | ||||||||||
| Proper motion (declination) | [mas/yr] | -216.2712355 (0.02) | -216.12496 (0.05) | -216.271 (0.02) | -216.12496 | ||||||||||
| Variability | NOV | ||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 13.92 | ||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | 14.10 | ||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 13.91 (0.03) | ||||||||||||||
| H magnitude | 13.97 (0.05) | ||||||||||||||
| K magnitude | 14.00 (0.05) | ||||||||||||||
| u magnitude | |||||||||||||||
| g magnitude | |||||||||||||||
| r magnitude | |||||||||||||||
| i magnitude | |||||||||||||||
| z magnitude | |||||||||||||||
| G magnitude | 13.82 (0.001) | 13.83 | 13.83 | 13.82 | 13.82 (0.003) | 13.83 | |||||||||
| BP magnitude | 13.82 (0.001) | 13.81 | 13.81 | ||||||||||||
| RP magnitude | 13.85 (0.0007) | 13.85 | 13.85 | ||||||||||||
| Pan g magnitude | 13.74 (0.003) | ||||||||||||||
| Pan r magnitude | 13.95 (0.005) | ||||||||||||||
| Pan i magnitude | 14.16 (0.005) | ||||||||||||||
| Pan z magnitude | 14.39 (0.003) | ||||||||||||||
| Pan y magnitude | 14.53 (0.003) | ||||||||||||||
| E(B-V) | 0.000 | ||||||||||||||
* Constant surface field
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