V* V749 Her

All names: PM 16550+2132, V* V749 Her, CNS5 4147, USNO-B1.0 1114-00264116, TIC 347629140, PG 1655+215, WDJ165709.86+212648.66, 2MASS J16570985+2126502, WISEA J165709.88+212642.7, 16571+2126, UBV 14353, uvby98 980169034, Gaia DR3 4565048312887877888, G 170-2, SDSS J165709.87+212646.8, PLX 3854.01, NLTT 43880, Gaia DR2 4565048312887877888, J1657+2126, GCRV 21680, Gaia EDR3 4565048312887877888, G 169-34, G170-2, GJ 1208, WD 1655+215, PG, LHS 3254, PM J16571+2126, LHS 3254, G169-34, LSPM J1657+2126, UBV M 53823, WD 1655+21, USNO 171, EGGR 197, SDSS J165709.86+212646.8, GEN# +9.80169034, CSI+21-16550

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 Kilic et al. 2020 McCleery et al. 2020 MWDD H Gaia DR2 Bedard et al. 2017 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Koester et al. 2009 Holberg et al. 2008 Liebert et al. 2005 Zuckerman et al. 2003 Bergeron et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 16 57 09.89 (0.01) 16 57 09.89 (0.02) 16 57 09.89 (0.02) 16 57 09.84 16 57 09.89 16 57 09.86 (0.01) 16 57 09.89 16 57 09.48
Declination 21 26 39.48 (0.01) 21 26 39.77 (0.02) 21 26 39.77 (0.02) 21 26 45.60 21 26 39.48 21 26 48.66 (0.01) 21 26 39.77 21 27 06.12
Spectral type DA DA DA DA DA DAB DA DAB DA DAB5.4 DA DA DA DA DA DA DA5.4 DA5
Effective temperature [K] 9147.0 (40) 9206.0 (74) 9233.0 (26) 9147.0 (41) 9219.2 (22) 9091.0 9229.0 (133) 9070.0 (241) 9240.0 (132) 9179.0 9179.0 (241) 9370.0 (134) 9204.0 (6) 9310.0 (133) 9206.0 9180.0 (230) 9190.0 (25)
log(g) [cgs] 8.01 (0.006) 8.01 (0.02) 8.03 (0.004) 8.00 (0.006) 8.02 (0.006) 7.99 8.07 (0.05) 7.59 (0.1) 8.02 (0.05) 7.87 (0.1) 8.27 (0.05) 8.03 (0.007) 8.20 (0.05) 7.84 7.87 (0.1) 8.01 (0.004)
Mass [M☉] 0.601 (0.005) 0.604 (0.01) 0.613 (0.003) 0.601 (0.005) 0.594 0.4 (0.05) 0.61 (0.03) 0.52 (0.06) 0.77 (0.03) 0.73 (0.03) 0.53 (0.06) 0.605 (0.004)
log(Luminosity) [L☉] -2.98 -2.90 -3.07 -2.91 (0.07)
Cooling age [Gyr] 0.8000 0.7643 0.5200 0.6300 1.0965 0.6400 (0.09)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-10.776
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] 47.63 (0.02) 47.63 (0.02) 47.60 (0.02) 47.60 (0.02) 47.60 (0.02) 43.00 (3) 43.00 (3) 43.00 (3) 43.00 (3) 43.00 (3) 47.63 47.63 (0.02) 47.60 (0.02) 43.00 (3)
Distance [pc] 20.99 (0.007) 21.00 (0.009) 21.01 (0.009) 21.01 (0.01) 21.01 (0.01) 23.00 (2) 23.26 (2) 23.30 (2) 23.25 23.30 (2) 17.00 18.63 18.00 23.26 (2) 20.99 20.99 (0.007) 21.01 (0.01) 23.26 (2)
Composition H H H H H H H H H H
Proper motion (right ascension) [mas/yr] 24.79080466 (0.01) 24.83445433 (0.03) 24.791 (0.01) 24.83445433
Proper motion (declination) [mas/yr] -573.8012252 (0.01) -573.9481902 (0.04) -573.801 (0.01) -573.9481902
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.34 14.34 14.32
V magnitude 14.09 14.13 14.04 14.10 14.13
R magnitude 14.03 14.03 14.10
I magnitude 13.92 13.92
J magnitude 13.86 (0.003) 13.89 13.85 13.89 13.89 (0.03)
H magnitude 13.82 (0.03) 13.80 13.76 13.80 13.82 (0.03)
K magnitude 13.86 (0.05) 13.85 13.78 13.85 13.86 (0.05)
u magnitude 14.54 (0.004) 14.72 (0.006) 14.72 (0.006)
g magnitude 14.29 (0.002) 14.29 (0.002)
r magnitude 14.38 (0.004) 14.38 (0.004)
i magnitude 14.42 (0.001) 14.42 (0.001)
z magnitude 14.46 (0.007) 14.46 (0.007)
G magnitude 14.08 (0.0008) 14.10 14.10 14.08 14.08 (0.003) 14.10
BP magnitude 14.16 (0.0008) 14.16 14.16
RP magnitude 13.93 (0.0007) 13.94 13.94
Pan g magnitude 14.14 (0.009) 14.14 (0.01)
Pan r magnitude 14.17 (0.002) 14.17 (0.002)
Pan i magnitude 14.27 (0.003) 14.27 (0.003)
Pan z magnitude 14.40 (0.001) 14.40 (0.001)
Pan y magnitude 14.48 (0.006) 14.48 (0.007)
E(B-V) 0.001

* Constant surface field

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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.