New Online Database of Symbiotic Variables: NSV 22840

Constellation
Ophiucus

Equatorial coordinates
α = 17 35 58.474
δ = -28 49 54.228

Galactic coordinates
l = 358.9699°
b = 1.8460°

Suspected	2013^Ref
Confirmed	2013^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

NSV 22840	IRAS -	GSC2.4.2 S8DS005010	AAVSO -
SIMBAD Terz V 2687	Pan-STARRS 73402639936402260	SAO -	VSX 61275
GAIA DR3 4060313750650464512	SkyMapper 173558.48-284954.0	WRAY -	GCVS -
2MASS J17355846-2849540	HIP -	Hen -	BD -
WISE J173558.47-284954.1	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	NSV 22840 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	263.9936^Ref	Parallax (mas)	0.004±0.076^Ref	Reddening E(B-V) (mag)	1.64±0.12^Ref ^{, Note}
Declination (°)	-28.8317^Ref	Distance (kpc)	8.52^Ref ^{, Note}, 5.62^Ref ^{, Note}
Galactic longitude (°)	358.9699^Ref	Proper motion in α (mas/yr)	4.45±0.09^Ref
Galactic latitude (°)	1.8460^Ref	Proper motion in δ (mas/yr)	-5.47±0.06^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	10.50^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	9.20^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.65^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.21^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.19^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.63^Ref	IPmax (eV)	54.4^Ref
B (mag)	-	WISE W4 (mag)	7.10^Ref	[O III] lines	Yes^Ref
V (mag)	17.70^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	15.80^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	17.36^Ref	IRAS 100μm (Jy)	-
G (mag)	15.01^Ref	AKARI S09 (Jy)	-
RP (mag)	13.55^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	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	Yes?^Ref			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	M0-3^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	55000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

The spectrum of this star confirms its S-type symbiotic nature, and the OGLE-IV light curve reveals potential eclipse in addition to semi-regular pulsations, as detailed in Miszalski et al. (2013).

References

Miszalski, B., Mikołajewska, J., Udalski, A., 2013, MNRAS, 432, 4, 3186, 2013MNRAS.432.3186M

NSV 22840