StHA 190
CONFIRMED
MILKY WAY
Constellation
Aquarius |
Equatorial coordinates
α = 21 41 44.892
δ = +02 43 54.479 |
Galactic coordinates
l = 58.4162°
b = -35.4321° |
Suspected |
1986Ref |
Confirmed |
1988Ref |
Symbiotic IR type |
D'Ref |
Hot component type |
shell-burningRef |
Outbursts |
- |
|
|
Symbiotic Catalogs
Bidelman (1954) |
- |
Allen (1984) |
- |
Belzcyński et al. (2001) |
StHA 190 (Conf.) |
Gaposchkin (1957) |
- |
Kenyon (1986) |
- |
Akras et al. (2019) |
StHA 190 (Conf.) |
Boyarchuk (1969) |
- |
Vaidis (1988, 1991) |
- |
Position
Right ascension (°) |
325.4370Ref |
Parallax (mas) |
0.878±0.020Ref |
Reddening E(B-V) (mag) |
0.08±0.0Ref, Note |
Declination (°) |
2.7318Ref |
Distance (kpc) |
1.10Ref, Note, 1.08Ref, Note |
|
|
Galactic longitude (°) |
58.4162Ref |
Proper motion in α (mas/yr) |
3.86±0.02Ref |
|
|
Galactic latitude (°) |
-35.4321Ref |
Proper motion in δ (mas/yr) |
4.04±0.01Ref |
|
|
Observations
X-Ray |
NoRef, NoRef, YesRef |
IR type |
D'Ref |
Radio |
YesRef |
X-Ray type |
βRef |
J (mag) |
8.71Ref |
Flickering |
NoRef |
GALEX FUV (mag) |
- |
H (mag) |
8.21Ref |
Outbursts |
- |
GALEX NUV (mag) |
- |
K (mag) |
8.02Ref |
Outburst type |
- |
IUE |
YesRef |
WISE W1 (mag) |
7.78Ref |
Jets |
YesRef |
FUSE |
NoRef |
WISE W2 (mag) |
7.44Ref |
Resolved nebula |
- |
U (mag) |
- |
WISE W3 (mag) |
4.12Ref |
IPmax (eV) |
35.1Ref |
B (mag) |
11.40Ref |
WISE W4 (mag) |
2.13Ref |
[O III] lines |
YesRef |
V (mag) |
10.54Ref |
IRAS 12μm (Jy) |
1.84Ref |
He II lines |
NoRef |
R (mag) |
- |
IRAS 25μm (Jy) |
1.65Ref |
[Fe VII] lines |
NoRef |
I (mag) |
- |
IRAS 60μm (Jy) |
0.40Ref |
O VI lines |
NoRef |
BP (mag) |
10.73Ref |
IRAS 100μm (Jy) |
2.95Ref |
|
|
G (mag) |
10.26Ref |
AKARI S09 (Jy) |
0.85Ref |
|
|
RP (mag) |
9.60Ref |
AKARI S18 (Jy) |
1.06Ref |
|
|
Orbit
Orbital period (days) |
171±7Ref |
γ velocity (km/h) |
-3.18±2.37Ref |
Size of giant’s orbit (AU) |
- |
Eccentricity |
- |
RV of giant (km/h) |
- |
Separation (AU) |
- |
Inclination (°) |
- |
Inferior conj. of giant (JD) |
- |
Mass function |
- |
Eclipses |
- |
|
|
Mass ratio |
- |
Orbital ephemeris |
- |
|
|
|
|
Cool component
Spectral type |
G5 IIIRef |
Mass (M⊙) |
2.5Ref, 2.25Ref |
Pulsation |
- |
Eff. temperature (K) |
5150Ref, 5300±150Ref |
Radius (R⊙) |
8.3Ref, 7.88Ref |
Type |
- |
IR type |
D'Ref |
Luminosity (L⊙) |
45Ref |
Pulsation period (days) |
- |
Metallicity [Fe/H] |
0Ref |
|
|
Pulsation ephemeris |
- |
Hot component
Type/Spectral type |
- |
Mass (M⊙) |
- |
Spin period (min) |
- |
Shell-burning/Accreting-only |
shell-burningRef |
Radius (R⊙) |
- |
Accretion disk |
- |
Eff. temperature (K) |
- |
Luminosity (L⊙) |
- |
|
|
Lower limit (K) |
- |
|
|
|
|
Upper limit (K) |
- |
|
|
|
|
Notes
Initially classified as a probable symbiotic star by Stephenson (1986), who noted a very red continuum together with emission lines. The symbiotic nature was subsequently confirmed by observations in Downes & Keyes (1988). In Munari et al. (2001), the discovery of a bipolar and highly variable mass outflow from the system was reported. They also claimed that the system has a very short orbital period of 171 days. The cool component in the system was identified as an extremely fast rotator in Zamanov et al. (2006).
References
- Downes, R. A., Keyes, C. D., 1988, AJ, 96, 777, 1988AJ.....96..777D
- Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
- Munari, U., Tomov, T., Yudin, B. F. et al., 2001, A&A, 369, L1, 2001A&A...369L...1M
- Mürset, U., Schmid, H. M., 1999, A&AS, 137, 473, 1999A&AS..137..473M
- Schmid, H. M., Nussbaumer, H., 1993, A&A, 268, 159, 1993A&A...268..159S
- Smith, V. V., Pereira, C. B., Cunha, K., 2001, ApJL, 556, 1, L55, 2001ApJ...556L..55S
- Sokoloski, J. L., Bildsten, L., Ho, W. C. G., 2001, MNRAS, 326, 2, 553, 2001MNRAS.326..553S
- Stephenson, C. B., 1986, ApJ, 300, 779, 1986ApJ...300..779S
- Zamanov, R. K., Bode, M. F., Melo, C. H. F. et al., 2006, MNRAS, 365, 4, 1215, 2006MNRAS.365.1215Z
Last updated: January 13, 2024