ASAS J190559-2109.4
CONFIRMED
MILKY WAY
Constellation
Sagittarius |
Equatorial coordinates
α = 19 05 59.110
δ = -21 09 25.080 |
Galactic coordinates
l = 15.3877°
b = -12.5460° |
| Suspected |
2020Ref |
| Confirmed |
2020Ref |
| Symbiotic IR type |
SRef |
| Hot component type |
accreting-onlyRef |
| Outbursts |
- |
|
|
Symbiotic Catalogs
| Bidelman (1954) |
- |
Allen (1984) |
- |
Belzcyński et al. (2001) |
- |
| Gaposchkin (1957) |
- |
Kenyon (1986) |
- |
Akras et al. (2019) |
- |
| Boyarchuk (1969) |
- |
Vaidis (1988, 1991) |
- |
Position
| Right ascension (°) |
286.4963Ref |
Parallax (mas) |
0.146±0.035Ref |
Reddening E(B-V) (mag) |
0.13±0.0Ref, Note |
| Declination (°) |
-21.1570Ref |
Distance (kpc) |
6.23Ref, Note, 5.04Ref, Note |
|
|
| Galactic longitude (°) |
15.3877Ref |
Proper motion in α (mas/yr) |
-6.79±0.04Ref |
|
|
| Galactic latitude (°) |
-12.5460Ref |
Proper motion in δ (mas/yr) |
-1.17±0.03Ref |
|
|
Observations
| X-Ray |
- |
IR type |
SRef |
Radio |
- |
| X-Ray type |
- |
J (mag) |
8.35Ref |
Flickering |
YesRef |
| GALEX FUV (mag) |
- |
H (mag) |
7.48Ref |
Outbursts |
- |
| GALEX NUV (mag) |
- |
K (mag) |
7.13Ref |
Outburst type |
- |
| IUE |
NoRef |
WISE W1 (mag) |
7.00Ref |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
7.13Ref |
Resolved nebula |
- |
| U (mag) |
- |
WISE W3 (mag) |
6.82Ref |
IPmax (eV) |
40.7Ref |
| B (mag) |
14.49Ref |
WISE W4 (mag) |
6.57Ref |
[O III] lines |
NoRef |
| V (mag) |
12.94Ref |
IRAS 12μm (Jy) |
- |
He II lines |
NoRef |
| R (mag) |
- |
IRAS 25μm (Jy) |
- |
[Fe VII] lines |
NoRef |
| I (mag) |
- |
IRAS 60μm (Jy) |
- |
O VI lines |
NoRef |
| BP (mag) |
13.06Ref |
IRAS 100μm (Jy) |
- |
|
|
| G (mag) |
11.47Ref |
AKARI S09 (Jy) |
0.13Ref |
|
|
| RP (mag) |
10.24Ref |
AKARI S18 (Jy) |
- |
|
|
Orbit
| Orbital period (days) |
- |
γ velocity (km/h) |
138.00±2.86Ref |
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 |
SRef, SRef,
S4.5/2Ref |
Mass (M⊙) |
- |
Pulsation |
- |
| Eff. temperature (K) |
3500Ref, 3400Ref |
Radius (R⊙) |
- |
Type |
- |
| IR type |
SRef |
Luminosity (L⊙) |
- |
Pulsation period (days) |
- |
| Metallicity [Fe/H] |
- |
|
|
Pulsation ephemeris |
- |
Hot component
| Type/Spectral type |
- |
Mass (M⊙) |
- |
Spin period (min) |
- |
| Shell-burning/Accreting-only |
accreting-onlyRef |
Radius (R⊙) |
- |
Accretion disk |
- |
| Eff. temperature (K) |
- |
Luminosity (L⊙) |
- |
|
|
| Lower limit (K) |
- |
|
|
|
|
| Upper limit (K) |
- |
|
|
|
|
Notes
Suspected by Adrian B. Lucy in the scope of the campaign searching for accreting-only symbiotic stars (Waagen, 2020). The spectrum obtained by Potanin et al. (2020) is consistent with such classification. This finding is also confirmed by Lucy (2021). The object was previously included in the S star catalog (Stephenson, 1984).
References
- Lucy, A. B., 2021, PhDT, 1, 2021PhDT........17L
- Maslennikova, N., Tatarnikova, A. A., Tatarnikov, A. et al., 2022, Astronomy at the Epoch of Multimessenger Studies, 447, 2022aems.conf..447M
- Potanin, S. A., Belinski, A. A., Dodin, A. V. et al., 2020, AstL, 46, 12, 836, 2020AstL...46..836P
- Stephenson, C. B., 1984, PW&SO, 1, 1984PW&SO...3....1S
- Waagen, E. O., 2020, AAVSO Alert Notice, 719, 1, 2020AAN...719....1W
Last updated: September 25, 2022