New Online Database of Symbiotic Variables: H 2-34

Constellation
Sagittarius

Equatorial coordinates
α = 17 58 28.031
δ = -28 33 42.129

Galactic coordinates
l = 1.7576°
b = -2.2319°

Suspected	1987^Ref
Confirmed	1987^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

H 2-34	IRAS -	GSC2.4.2 S8DG049279	AAVSO 000-BJT-845
SIMBAD PN H 2-34	Pan-STARRS 73722696168176280	SAO -	VSX 241063
GAIA DR3 4062591045559960064	SkyMapper -	WRAY -	GCVS -
2MASS J17582804-2833419	HIP -	Hen -	BD -
WISE J175828.03-283342.3	TYC -	ESO 456-28	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	H 2-34 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	H 2-34 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	H-2-34 (Susp.)

Position

Right ascension (°)	269.6168^Ref	Parallax (mas)	0.137±0.055^Ref	Reddening E(B-V) (mag)	1.0±0.04^Ref ^{, Note}
Declination (°)	-28.5617^Ref	Distance (kpc)	6.38^Ref ^{, Note}, 6.66^Ref ^{, Note}
Galactic longitude (°)	1.7576^Ref	Proper motion in α (mas/yr)	-3.25±0.06^Ref
Galactic latitude (°)	-2.2319^Ref	Proper motion in δ (mas/yr)	-6.91±0.04^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	9.42^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.13^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.61^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.04^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.38^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.94^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	5.77^Ref	[O III] lines	No^Ref
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	No^Ref
R (mag)	15.62^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	16.92^Ref	IRAS 100μm (Jy)	-
G (mag)	14.64^Ref	AKARI S09 (Jy)	-
RP (mag)	13.11^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	459±20^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 (I) = 2451974 + 459±20 x E^Ref

Cool component

Spectral type	M5:^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	109±1^Ref
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)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Strong [Fe VII] lines and O VI lines were detected in the spectrum of the object by Stenholm & Acker (1987). This observation was further supported by the detection of O VI lines in the spectrum by Acker et al. (1988).

References

Acker, A., Lundstrom, I., Stenholm, B., 1988, A&AS, 73, 325, 1988A&AS...73..325A
Stenholm, B., Acker, A., 1987, A&AS, 68, 51, 1987A&AS...68...51S

H 2-34