Coordinates

RA: 18^h20^m21^s.939
DEC: +07^∘11'07''.184
Position-uncertainty [arcsec]: 9.140 × 10^-5
Galactic-longitude [deg]: 35.85
Galactic-latitude [deg]: 10.16
Coordinate-Reference

Binary System

Alternative Name: ASASSN -18ey
X-ray Type: XT, BH, MQ?
Mean Distance [kpc]: 1.82^[1]
Distance Range [kpc]: 1.77 - 1.85^[1]
Hydrogen Column density [10²² cm⁻²]: 0.03
^[1]
G-band Absorption [mag]: 0.01
^[1]

Compact Object

Mass[M_☉]: 6.75^[1]

Orbital Period [d]: 0.68549^[1]


soft energy band: 0.3-10.0 keV
soft-band flux [10^-12 erg cm^-2 s^-1]:569.06 - 4489.0
soft X-ray variability: 7.89
hard energy band: 20.0-100.0 keV

Optical Counterpart

Gaia DR3 Name: 4477902563164690816
Mass[M_☉]: 0.49^[1]
Spectral Type: K3-5^[1]
G [mag]: 17.387(0.032)
^[1]

J [mag]: 15.87(0.07)
^[1]
H [mag]: 15.44(0.10)
^[1]
K [mag]: 15.12(0.12)
^[1]
W1 [mag]: 14.17(0.04)
^[1]
W2 [mag]: 13.798(0.026)
^[1]