Hen 2-171

CONFIRMED MILKY WAY

Constellation
Scorpius

Equatorial coordinates
α = 16 34 04.238
δ = -35 05 26.820

Galactic coordinates
l = 346.0266°
b = 8.5504°

Suspected	1973^Ref
Confirmed	1973^Ref
Symbiotic IR type	D^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Hen 2-171	IRAS 16307-3459	GSC2.4.2 S8RU001028	AAVSO 000-BKS-260
SIMBAD WRAY 16-226	Pan-STARRS -	SAO -	VSX 59124
GAIA DR3 6020686328090453888	SkyMapper 163404.24-350526.8	WRAY 16-226	GCVS -
2MASS J16340424-3505268	HIP -	Hen 2-171	BD -
WISE J163404.26-350526.6	TYC -	ESO 390-7	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	He2-171 (Conf.)	Belzcyński et al. (2001)	Hen 2-171 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	He2-171 (Conf.)	Akras et al. (2019)	Hen 2-171 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	M-69 (Conf.)

Position

Right ascension (°)	248.5177^Ref	Parallax (mas)	0.405±0.123^Ref	Reddening E(B-V) (mag)	0.44±0.0^Ref ^{, Note}
Declination (°)	-35.0908^Ref	Distance (kpc)	5^Ref 2.48^Ref ^{, Note}, 6.36^Ref ^{, Note}
Galactic longitude (°)	346.0266^Ref	Proper motion in α (mas/yr)	-3.18±0.16^Ref
Galactic latitude (°)	8.5504^Ref	Proper motion in δ (mas/yr)	-4.98±0.13^Ref

Observations

X-Ray	No^Ref	IR type	D^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	9.68^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.03^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	6.64^Ref	Outburst type	-
IUE	Yes^Ref	WISE W1 (mag)	4.87^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	4.02^Ref	Resolved nebula	No^Ref
U (mag)	-	WISE W3 (mag)	2.59^Ref	IPmax (eV)	235^Ref, 114^Ref
B (mag)	-	WISE W4 (mag)	1.53^Ref	[O III] lines	Yes^Ref
V (mag)	14.80^Ref	IRAS 12μm (Jy)	7.47^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	4.58^Ref	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	0.75^Ref	O VI lines	Yes^Ref
BP (mag)	18.73^Ref	IRAS 100μm (Jy)	4.97^Ref
G (mag)	14.87^Ref	AKARI S09 (Jy)	4.78^Ref
RP (mag)	13.26^Ref	AKARI S18 (Jy)	3.19^Ref

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	M6.5 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	D^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)	163000^Ref	Luminosity (L_⊙)	12000^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

The detection of [Fe X] in the spectra was reported by Webster & Allen (1975).

References

Kaler, J. B., Hayes, J., Bell, D. et al., 1991, PASP, 103, 561, 1991PASP..103..561K
Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M
Mürset, U., Schmid, H. M., 1999, A&AS, 137, 473, 1999A&AS..137..473M
Sanduleak, N., Stephenson, C. B., 1973, ApJ, 185, 899, 1973ApJ...185..899S
Stenholm, B., Acker, A., 1987, A&AS, 68, 51, 1987A&AS...68...51S
Webster, B. L., Allen, D. A., 1975, MNRAS, 171, 171, 1975MNRAS.171..171W
Whitelock, P. A., 1987, PASP, 99, 573, 1987PASP...99..573W

Last updated: April 15, 2022