Coordinates

RA: 17^h48^m052^s.76
DEC: -20^∘21'0024''.0
Position-uncertainty [arcsec]: 1.007 × 10⁰
Galactic-longitude [deg]: 7.73
Galactic-latitude [deg]: 3.8
Coordinate-Reference

Binary System

Alternative Name: NGC 6440 X-2
X-ray Type: GC, XT, XP
Mean Distance [kpc]: 8.4^[1]
Distance Range [kpc]: 7.1 - 9.9^[1]
Hydrogen Column density [10²² cm⁻²]: 0.7
^[1]
G-band Absorption [mag]: 2.44
^[1]

Compact Object

Mass[M_☉]: 1.4^[1]

Orbital Period [d]: 0.040022^[1]
Pulse Period [s]: 0.004857^[1]

soft energy band: 0.3-10.0 keV
soft-band flux [10^-12 erg cm^-2 s^-1]:0.51 - 24.32
soft X-ray variability: 47.35

Optical Counterpart

Mass[M_☉]: 0.0076^[1]


V [mag]: 21.0
^[1]