Hen 3-461

CONFIRMED MILKY WAY

Constellation
Vela

Equatorial coordinates
α = 10 39 08.660
δ = -51 24 12.603

Galactic coordinates
l = 282.9046°
b = 6.2500°

Suspected	1976^Ref
Confirmed	1984^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Hen 3-461	IRAS 10370-5108	GSC2.4.2 S5OW001282	AAVSO 000-BGT-699
SIMBAD WRAY 15-619	Pan-STARRS -	SAO -	VSX 91919
GAIA DR3 5360768073375283712	SkyMapper 103908.67-512412.7	WRAY 15-619	GCVS -
2MASS J10390870-5124125	HIP -	Hen 3-461	BD -
WISE J103908.65-512412.6	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	Hen 461 (Susp.)	Belzcyński et al. (2001)	Hen 3-461 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	Hen 461 (Susp.)	Akras et al. (2019)	Hen 3-461 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	VDS 25 (Conf.)

Position

Right ascension (°)	159.7861^Ref	Parallax (mas)	0.678±0.049^Ref	Reddening E(B-V) (mag)	0.42±0.01^Ref ^{, Note}
Declination (°)	-51.4035^Ref	Distance (kpc)	1.6^Ref 1.43^Ref ^{, Note}, 1.46^Ref ^{, Note}
Galactic longitude (°)	282.9046^Ref	Proper motion in α (mas/yr)	-11.19±0.06^Ref
Galactic latitude (°)	6.2500^Ref	Proper motion in δ (mas/yr)	3.07±0.05^Ref

Observations

X-Ray	Yes^Ref	IR type	S^Ref	Radio	-
X-Ray type	β/δ^Ref	J (mag)	5.24^Ref	Flickering	Yes^Ref
GALEX FUV (mag)	-	H (mag)	4.19^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	3.86^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	3.64^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	3.46^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	3.28^Ref	IPmax (eV)	99^Ref
B (mag)	13.71^Ref	WISE W4 (mag)	3.01^Ref	[O III] lines	Yes^Ref
V (mag)	12.32^Ref	IRAS 12μm (Jy)	2.02^Ref	He II lines	No^Ref
R (mag)	-	IRAS 25μm (Jy)	0.61^Ref	[Fe VII] lines	Yes?^Ref
I (mag)	-	IRAS 60μm (Jy)	0.40^Ref	O VI lines	No^Ref
BP (mag)	12.64^Ref	IRAS 100μm (Jy)	8.63^Ref
G (mag)	9.61^Ref	AKARI S09 (Jy)	2.54^Ref
RP (mag)	8.11^Ref	AKARI S18 (Jy)	0.76^Ref

Orbit

Orbital period (days)	2271±17^Ref	γ velocity (km/h)	37.86±0.31^Ref, 43.29±1.04^Ref	Size of giant’s orbit (AU)	1.49^Ref
Eccentricity	0.4±0.04^Ref	RV of giant (km/h)	7.81±0.35^Ref	Separation (AU)	-
Inclination (°)	60^Ref	Inferior conj. of giant (JD)	2452673	Mass function	0.086^Ref
Eclipses	-			Mass ratio	1.7^Ref
Orbital ephemeris	-

Cool component

Spectral type	M7 III^Ref	Mass (M_⊙)	1.5^Ref	Pulsation	Yes^Ref
Eff. temperature (K)	3200±100^Ref	Radius (R_⊙)	178±15^Ref	Type	-
IR type	S^Ref	Luminosity (L_⊙)	2977±625^Ref	Pulsation period (days)	79±1^Ref
Metallicity [Fe/H]	0.12±0.11^Ref			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	0.88^Ref	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

This system has one of the longest orbital periods among the S-type symbiotics (Fekel et al., 2017).

References

Allen, D. A., 1984, PASA, 5, 3, 369, 1984PASA....5..369A
Fekel, F. C., Hinkle, K. H., Joyce, R. R. et al., 2017, AJ, 153, 1, 35, 2017AJ....153...35F
Henize, K. G., 1976, ApJS, 30, 491, 1976ApJS...30..491H
Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Nuñez, N. E., Nelson, T., Mukai, K. et al., 2016, ApJ, 824, 1, 23, 2016ApJ...824...23N
Pereira, C. B., Landaberry, S. J. C., Da Conceição, F., 1998, AJ, 116, 4, 1971, 1998AJ....116.1971P

Last updated: January 12, 2024