Coordinates

RA: 05^h38^m54^s.574
DEC: +26^∘18'56''.791
Position-uncertainty [arcsec]: 2.572 × 10^-5
Galactic-longitude [deg]: 181.45
Galactic-latitude [deg]: -2.64
Coordinate-Reference

Binary System

Alternative Name: 3A 0535+262
X-ray Type: BE,CL,HT,QPO,RS,XP,XT
Mean Distance [kpc]: 1.66
Distance Range [kpc]: 1.38 - 1.87
Hydrogen Column density [10²¹ cm⁻²]: 1.79

Compact Object

Orbital Period [d]: 110.6^{[1][2][3][4][5]}
Pulse Period [s]: 103.47^{[1][2][3][4][5]}
CRSF energy [keV]: 50,110^[1][2][3][4]
XMM-Newton flux [10^-12 erg cm^-2 s^-1]:27.26 (0.2-12.0 keV)
Chandra flux [10^-12 erg cm^-2 s^-1]:0.0 (~0.1-10.0 keV)
Swift/XRT flux [10^-12 erg cm^-2 s^-1]:96.35 (0.3-10.0 keV)
Swift/BAT flux [10^-12 erg cm^-2 s^-1]:1293.65 (14-195 keV)

Optical Counterpart

Gaia DR3 Name: 3441207615229815040
Counterpart: confirmed
Spectral Type: O9.7IIIe^[1][2][3]
G [mag]: 8.6020(0.0029)
V [mag]: 9.39
J [mag]: 8.368(0.021)
H [mag]: 8.272(0.026)
K [mag]: 8.157(0.027)
W1 [mag]: 6.829(0.019)
W2 [mag]: 6.631(0.014)
Effective stellar temperature [K]: 41504.0