V2506 Sgr

CONFIRMED MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 11 01.681
δ = -28 32 40.502

Galactic coordinates
l = 3.1197°
b = -4.6318°

Suspected	1974^Ref
Confirmed	1984^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref

Identifiers

V2506 Sgr	IRAS -	GSC2.4.2 S9SQ066186	AAVSO 000-BCX-076
SIMBAD EM* AS 282	Pan-STARRS 73742727570256856	SAO -	VSX 30206
GAIA DR3 4050848540419995776	SkyMapper -	WRAY 16-379	GCVS V2506 Sgr
2MASS J18110168-2832402	HIP -	Hen 2-358	BD -
WISE J181101.68-283240.3	TYC -	ESO 456-66	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	V2506 Sgr (Conf.)	Belzcyński et al. (2001)	V2506 Sgr (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	V2506 Sgr (Conf.)	Akras et al. (2019)	V2506 Sgr (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	V2506 Sgr (Conf.)

Position

Right ascension (°)	272.7570^Ref	Parallax (mas)	0.095±0.027^Ref	Reddening E(B-V) (mag)	0.43±0.02^Ref ^{, Note}
Declination (°)	-28.5446^Ref	Distance (kpc)	5^Ref 6.70^Ref ^{, Note}, 6.11^Ref ^{, Note}
Galactic longitude (°)	3.1197^Ref	Proper motion in α (mas/yr)	-6.01±0.04^Ref
Galactic latitude (°)	-4.6318^Ref	Proper motion in δ (mas/yr)	-8.79±0.03^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	9.53^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.60^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	8.17^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.95^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.98^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.48^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	6.60^Ref	[O III] lines	No^Ref
V (mag)	15.00^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	14.63^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	14.93^Ref	IRAS 100μm (Jy)	-
G (mag)	13.17^Ref	AKARI S09 (Jy)	-
RP (mag)	11.85^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	868±80^Ref	γ velocity (km/h)	62.01±3.93^Ref	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 (B) = 2448781 + 868±80 x E^Ref

Cool component

Spectral type	M4 III^Ref, M2 III^Ref, M5.5 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	3560^Ref	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	93±1^Ref
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_⊙)	700^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

References

Allen, D. A., Glass, I. S., 1974, MNRAS, 167, 337, 1974MNRAS.167..337A
Allen, D. A., 1984, PASA, 5, 3, 369, 1984PASA....5..369A
Bond, H. E., 1976, PASP, 88, 192, 1976PASP...88..192B
Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
Kaler, J. B., Hayes, J., Bell, D. et al., 1991, PASP, 103, 561, 1991PASP..103..561K
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
Mürset, U., Schmid, H. M., 1999, A&AS, 137, 473, 1999A&AS..137..473M
Webster, B. L., Allen, D. A., 1975, MNRAS, 171, 171, 1975MNRAS.171..171W

Last updated: April 18, 2022