Coordinates
RA: 19h03m39s.391
DEC: +03∘12'15''.689
Position-uncertainty [arcsec]: 2.715 × 10-4
Galactic-longitude [deg]: 37.18
Galactic-latitude [deg]: -1.25
Coordinate-Reference
Binary System
Alternative Name: 1H 1858+031
X-ray Type: CL,XP,XT
Mean Distance [kpc]: 3.66
Distance Range [kpc]: 0.84 - 7.88
Compact Object
Orbital Period [d]: 22.58[1]
Pulse Period [s]: 2.76[1]
CRSF energy [keV]: 30[1]
INTEGRAL flux [10-12 erg cm-2 s-1]:168.74 (17-60 keV)
Optical Counterpart
Gaia DR3 Name: 4268774695647764352
Counterpart: confirmed
Spectral Type: B8-9 IVe[1]
G [mag]: 18.542(0.004)
J [mag]: 14.138(0.028)
H [mag]: 13.220(0.033)
K [mag]: 12.581(0.028)
W1 [mag]: 11.994(0.014)
W2 [mag]: 11.776(0.010)
Effective stellar temperature [K]: 4971.0
