EGGR 156
All names: WDJ225726.12+075542.60, UBV 19675, SDSS J225726.01+075541.1, SDSS J225726.05+075541.7, WIRED J225726.05+075541.7, NLTT 55381, Gaia DR3 2712240064671438720, WD 2254+07, USNO-B1.0 0979-00742471, EGGR 156, GEN# +9.80028027, Gaia DR2 2712240064671438720, PLX 5566.01, Gaia EDR3 2712240064671438720, CSI+07-22549, G 28-27, LSPM J2257+0755, G28-27, USNO 484, J2257+0755, LTT 16749, SDSS J225726.05+075541.6, 2254+076, WD 2254+076
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Jewett et al. 2024 | Kilic et al. 2020 | Leggett et al. 2018 | MWDD H | Gaia DR2 | Stilism | Ferrario et al. 2015 | Kulebi et al. 2009 | Bergeron et al. 1997 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 57 25.94 (0.09) | 22 57 26.05 | 22 57 25.94 (0.1) | 22 57 26.05 | 22 57 25.94 | 22 57 26.12 (0.09) | 22 57 25.94 | 22 57 26.26 | 22 57 26.05 | |||||||||||
| Declination | 07 55 39.91 (0.08) | 07 55 41.69 | 07 55 39.99 (0.1) | 07 55 41.70 | 07 55 39.91 | 07 55 42.59 (0.08) | 07 55 39.99 | 07 55 51.60 | 07 55 41.71 | |||||||||||
| Spectral type | DAH | DAH | DAH | DAH4.2 | DA | DA | DAH | DQ | DA: | DAH | DAH | DQ5 | DAH | DAH | ||||||
| Effective temperature | [K] | 13407.0 (128) | 13407.0 (128) | 13407.0 (128) | 12074.0 (471) | 11861.0 | 40000.0 | 12230.0 (990) | 13118.0 (362) | 85279.0 (2742) | ||||||||||
| log(g) | [cgs] | 9.29 (0.008) | 9.29 | 9.29 (0.01) | 9.23 (0.04) | 9.19 | 8.00 (0) | 8.00 (0) | 9.28 (0.02) | 9.99 (0.02) | ||||||||||
| Mass | [M☉] | 1.298 (0.003) | 1.298 (0.003) | 1.298 (0.003) | 1.281 (0.01) | 1.269 | 0.58 | 1.295 (0.007) | ||||||||||||
| log(Luminosity) | [L☉] | -2.49 | ||||||||||||||||||
| Cooling age | [Gyr] | 1.7200 (0.02) | 1.7370 (0.1) | 1.8120 | 0.4800 | |||||||||||||||
| 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] | 21.97 (0.1) | 22.46 (0.6) | 21.97 (0.1) | -2.10 (9) | 21.97 | 21.97 (0.1) | 21.97 (0.1) | 3.00 (7) | |||||||||||
| Distance | [pc] | 45.52 (0.2) | 44.52 (1) | 45.51 (0.3) | 45.52 | 45.52 (0.2) | 45.51 (0.3) | 333.33 (778) | ||||||||||||
| Composition | H | H | H | H | He | |||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -165.6122884 (0.09) | -165.6992341 (0.2) | -165.612 (0.09) | -165.699 | |||||||||||||||
| Proper motion (declination) | [mas/yr] | -167.8203793 (0.08) | -168.0450115 (0.2) | -167.82 (0.08) | -168.045 | |||||||||||||||
| Variability | ||||||||||||||||||||
| Magnetic | yes | yes | ||||||||||||||||||
| Bd | [MG] | 16.17 (3) | 16.17 (3) | |||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||||
| Binarity | ||||||||||||||||||||
| B magnitude | 17.19 | 17.20 | ||||||||||||||||||
| V magnitude | 17.17 | |||||||||||||||||||
| R magnitude | 17.18 | 17.00 | ||||||||||||||||||
| I magnitude | 17.13 | |||||||||||||||||||
| J magnitude | ||||||||||||||||||||
| H magnitude | ||||||||||||||||||||
| K magnitude | ||||||||||||||||||||
| u magnitude | 17.10 (0.009) | 17.10 (0.009) | 17.11 (0.009) | 17.09 | 17.10 (0.02) | |||||||||||||||
| g magnitude | 17.07 (0.005) | 17.07 (0.005) | 17.09 (0.004) | 17.11 | 17.10 (0.02) | |||||||||||||||
| r magnitude | 17.30 (0.006) | 17.30 (0.006) | 17.29 (0.005) | 17.31 | 17.31 (0.02) | |||||||||||||||
| i magnitude | 17.43 (0.007) | 17.43 (0.007) | 17.43 (0.006) | 17.44 | 17.45 (0.01) | |||||||||||||||
| z magnitude | 17.64 (0.02) | 17.64 (0.01) | 17.64 (0.02) | 17.65 | 17.65 (0.02) | |||||||||||||||
| G magnitude | 17.16 (0.007) | 17.18 | 17.16 | 17.16 (0.003) | 17.18 | |||||||||||||||
| BP magnitude | 17.16 (0.007) | 17.11 | 17.11 | |||||||||||||||||
| RP magnitude | 17.17 (0.008) | 17.17 | 17.17 | |||||||||||||||||
| Pan g magnitude | 17.11 (0.002) | |||||||||||||||||||
| Pan r magnitude | 17.30 (0.004) | |||||||||||||||||||
| Pan i magnitude | 17.46 (0.005) | |||||||||||||||||||
| Pan z magnitude | 17.65 (0.009) | |||||||||||||||||||
| Pan y magnitude | 17.79 (0.01) | |||||||||||||||||||
| E(B-V) | 0.002 | |||||||||||||||||||
* Constant surface field
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