SUSPECTED M31
Equatorial coordinates
α = 10.828546 | 00 43 18.851000
δ = 41.338478 | +41 20 18.520000 |
|
| Constellation |
Andromeda |
| Symbiotic IR Type |
|
| Spectral Type |
K or earlier |
| Magnitude range (V) |
|
| Outbursts |
|
|
|
Identifiers
| CXO J004318.8+412016 |
GSC – |
TYC – |
WRAY – |
| SIMBAD RX J004318.6+412024 |
HIP – |
SAO – |
Hen – |
| BD – |
IRAS – |
GAIA DR2 – |
ESO – |
| HD – |
2MASS – |
WISE – |
AAVSO – |
Position
| Right ascension (°) |
10.828546 |
Parallax (mas) |
– |
Reddening E(B-V) (mag) |
0.400 ± 0.065 |
| Declination (°) |
41.338478 |
Distance (kpc) |
785.00 ± 25.00 |
|
|
| Galactic longitude (°) |
121.293050 |
Proper motion in α (mas/yr) |
– |
|
|
| Galactic latitude (°) |
-21.507420 |
Proper motion in δ (mas/yr) |
– |
|
|
Observations
| U (mag) |
21.69 |
X-Ray |
Yes |
Flickering |
|
| B (mag) |
23.13 |
X-Ray type |
α |
Outbursts |
No |
| V (mag) |
22.43 |
IUE |
No |
Type |
|
| R (mag) |
21.94 |
IRAS flux at 12 μm (Jy) |
|
IPmax (eV) |
35.1 |
| I (mag) |
21.00 |
IRAS flux at 25 μm (Jy) |
|
OVI lines |
No |
| G (mag) |
|
IRAS flux at 60 μm (Jy) |
|
|
|
| J (mag) |
|
IRAS flux at 100 μm (Jy) |
|
|
|
| H (mag) |
|
WISE W1 (mag) |
|
|
|
| K (mag) |
|
WISE W2 (mag) |
|
|
|
| L (mag) |
|
WISE W3 (mag) |
|
|
|
| |
|
WISE W4 (mag) |
|
|
|
| |
|
Radio |
|
|
|
| |
|
Radio flux (mJy) |
|
|
|
Orbit
| Orbital period (days) |
230 |
γ velocity (km/h) |
|
Size of giant’s orbit (AU) |
|
| Eccentricity |
|
RV of giant (km/h) |
|
Separation (AU) |
|
| Inclination (°) |
0 |
Inferior conj. of giant (JD) |
|
Mass function |
|
| Ephemeris type |
|
|
|
Mass ratio |
0.77 |
| Ephemeris T0 (JD) |
|
|
|
|
|
Cool component
| Spectral type |
K or earlier |
Mass (M⊙) |
1 |
Pulsation |
|
| Eff. temperature (K) |
4000 |
Radius (R⊙) |
80 |
Type |
|
| IR type |
|
Luminosity (L⊙) |
|
Pulsation period (days) |
|
| Metallicity [Fe/H] |
|
|
|
Ephemeris type |
|
| |
|
|
|
Ephemeris T0 (JD) |
|
Hot component
| Type/Spectra |
WD/BH? |
Mass (M⊙) |
1.3 |
Spin period (min) |
|
| Eff. temperature (K) |
775000 |
Radius (R⊙) |
|
Accretion disk |
|
| Lower limit (K) |
|
Luminosity (L⊙) |
61.3 |
|
|
| Upper limit (K) |
|
|
|
|
|
Links
SIMBAD CDS Portal
Notes
The continuum energy distribution and the spectral characteristics demonstrate the presence of a red giant of K or earlier spectral type (Orio et al., 2017). CXO J004318.8+412016 has been observed in X-rays as a luminous supersoft source (SSS) since 1979, with variable X-ray luminosity.
References
- Orio, M., Luna, G. J. M., Kotulla, R., et al., 2017, MNRAS, 470, 2212, 2017MNRAS.470.2212O
Last updated: Jan 12, 2019 @ 4:54 pm
