New Online Database of Symbiotic Variables: SS73 122

Constellation
Sagittarius

Equatorial coordinates
α = 18 04 41.215
δ = -27 09 12.514

Galactic coordinates
l = 3.6625°
b = -2.7328°

Suspected	1980^Ref
Confirmed	1984^Ref
Symbiotic IR type	D^Ref, S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

SS73 122	IRAS 18015-2709	GSC2.4.2 S9S4032473	AAVSO 000-BJT-849
SIMBAD SS73 122	Pan-STARRS 75412711717726171	SAO -	VSX 241071
GAIA DR3 4063155232326973824	SkyMapper 180441.22-270912.4	WRAY -	GCVS -
2MASS J18044122-2709124	HIP -	Hen -	BD -
WISE J180441.21-270912.5	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	SS 122 (Conf.)	Belzcyński et al. (2001)	SS73 122 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	SS 122 (Conf.)	Akras et al. (2019)	SS73 122 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	VDS 114 (Conf.)

Position

Right ascension (°)	271.1717^Ref	Parallax (mas)	-0.026±0.055^Ref	Reddening E(B-V) (mag)	1.1±0.04^Ref ^{, Note}
Declination (°)	-27.1535^Ref	Distance (kpc)	4.8^Ref 9.25^Ref ^{, Note}, 7.34^Ref ^{, Note}
Galactic longitude (°)	3.6625^Ref	Proper motion in α (mas/yr)	-3.89±0.07^Ref
Galactic latitude (°)	-2.7328^Ref	Proper motion in δ (mas/yr)	-5.65±0.05^Ref

Observations

X-Ray	No^Ref	IR type	D^Ref, S^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	8.31^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	7.06^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	6.36^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	5.68^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	5.25^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	4.03^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	3.04^Ref	[O III] lines	Yes^Ref
V (mag)	15.42^Ref	IRAS 12μm (Jy)	1.44^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	1.00^Ref	[Fe VII] lines	Yes^Ref
I (mag)	12.63^Ref	IRAS 60μm (Jy)	13.20^Ref	O VI lines	Yes^Ref
BP (mag)	14.33^Ref	IRAS 100μm (Jy)	212.00^Ref
G (mag)	13.17^Ref	AKARI S09 (Jy)	1.27^Ref
RP (mag)	11.89^Ref	AKARI S18 (Jy)	0.71^Ref

Orbit

Orbital period (days)	2409±10^Ref	γ velocity (km/h)	-	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	Min (RI) = 2446709 + 2409±10 x E^Ref

Cool component

Spectral type	M7.5 III^Ref, M7 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	3073^Ref	Radius (R_⊙)	-	Type	SR^Ref
IR type	D^Ref, S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	189±4^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	WD^Ref	Mass (M_⊙)	-	Spin period (min)	22.8?^Ref
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	12000^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

Originally identified as a Be star in Sanduleak & Stephenson (1973), it was later suspected to be a Mira pulsator by Whitelock (1987), although the confirmation of an infrared type D has not been established. In Toma et al. (2016), periodic modulation with a period of 22.8 minutes and an amplitude of 0.006 mag was reported.

References

Allen, D. A., 1980, MNRAS, 192, 521, 1980MNRAS.192..521A
Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
Medina Tanco, G. A., Steiner, J. E., 1995, AJ, 109, 1770, 1995AJ....109.1770M
Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M
Sanduleak, N., Stephenson, C. B., 1973, ApJ, 185, 899, 1973ApJ...185..899S
Toma, R., Ramsay, G., Macfarlane, S. et al., 2016, MNRAS, 463, 1, 1099, 2016MNRAS.463.1099T
Whitelock, P. A., 1987, PASP, 99, 573, 1987PASP...99..573W

SS73 122