Th 3-7

CONFIRMED MILKY WAY

Constellation
Ophiucus

Equatorial coordinates
α = 17 21 02.535
δ = -29 22 52.893

Galactic coordinates
l = 356.7064°
b = 4.2608°

Suspected	1975^Ref
Confirmed	1984^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Th 3-7	IRAS -	GSC2.4.2 S8HH154548	AAVSO 000-BJT-832
SIMBAD PN Th 3-7	Pan-STARRS 72742602605792683	SAO -	VSX 241037
GAIA DR3 4059348585602948864	SkyMapper -	WRAY -	GCVS -
2MASS J17210254-2922527	HIP -	Hen -	BD -
WISE J172102.53-292252.6	TYC -	ESO 454-12	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	Th3-7 (Conf.)	Belzcyński et al. (2001)	Th 3-7 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	Th3-7 (Conf.)	Akras et al. (2019)	PN Th 3-7 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	Th 3-7 (Conf.)

Position

Right ascension (°)	260.2606^Ref	Parallax (mas)	-0.120±0.080^Ref	Reddening E(B-V) (mag)	0.95±0.04^Ref ^{, Note}
Declination (°)	-29.3814^Ref	Distance (kpc)	10^Ref, 6^Ref 9.14^Ref ^{, Note}, 8.02^Ref ^{, Note}
Galactic longitude (°)	356.7064^Ref	Proper motion in α (mas/yr)	-0.12±0.09^Ref
Galactic latitude (°)	4.2608^Ref	Proper motion in δ (mas/yr)	-6.11±0.07^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	9.75^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.49^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.88^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.53^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.67^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.32^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	6.95^Ref	[O III] lines	Yes^Ref
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	18.03^Ref	IRAS 100μm (Jy)	-
G (mag)	14.92^Ref	AKARI S09 (Jy)	-
RP (mag)	13.36^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	-			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	M5 III^Ref, M5-6 III^Ref, M3 III^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	3343^Ref	Radius (R_⊙)	-	Type	-
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	WD^Ref	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	820^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

References

Allen, D. A., Glass, I. S., 1975, MNRAS, 170, 579, 1975MNRAS.170..579A
Allen, D. A., 1980, MNRAS, 192, 521, 1980MNRAS.192..521A
Allen, D. A., 1984, PASA, 5, 3, 369, 1984PASA....5..369A
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

Last updated: April 17, 2022