V4018 Sgr

CONFIRMED MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 25 26.842
δ = -28 35 57.478

Galactic coordinates
l = 4.5498°
b = -7.4607°

Suspected	1973^Ref
Confirmed	1978^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref - Z And^Ref

Identifiers

V4018 Sgr	IRAS 18221-2837	GSC2.4.2 S9TC000549	AAVSO 000-BCX-097
SIMBAD CD-28 14567	Pan-STARRS 73682763618391134	SAO -	VSX 31718
GAIA DR3 4051187391825733504	SkyMapper 182526.84-283557.4	WRAY 15-1868	GCVS V4018 Sgr
2MASS J18252684-2835572	HIP -	Hen 3-1691	BD -
WISE J182526.85-283557.4	TYC 6869-806-1	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	Hen 1691 (Conf.)	Belzcyński et al. (2001)	V4018 Sgr (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	CD-28°14567 (Conf.)	Akras et al. (2019)	V4018 Sgr (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-28°14567 (Conf.)

Position

Right ascension (°)	276.3618^Ref	Parallax (mas)	0.169±0.029^Ref	Reddening E(B-V) (mag)	0.34±0.01^Ref ^{, Note}
Declination (°)	-28.5993^Ref	Distance (kpc)	5^Ref, 2.5^Ref 5.59^Ref ^{, Note}, 5.29^Ref ^{, Note}
Galactic longitude (°)	4.5498^Ref	Proper motion in α (mas/yr)	-2.90±0.03^Ref
Galactic latitude (°)	-7.4607^Ref	Proper motion in δ (mas/yr)	0.72±0.03^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	8.64^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	7.79^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	7.44^Ref	Outburst type	Z And^Ref
IUE	Yes^Ref	WISE W1 (mag)	7.30^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.37^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.01^Ref	IPmax (eV)	99^Ref
B (mag)	11.73^Ref	WISE W4 (mag)	6.40^Ref	[O III] lines	Yes^Ref
V (mag)	11.00^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	11.60^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	12.04^Ref	IRAS 100μm (Jy)	-
G (mag)	11.34^Ref	AKARI S09 (Jy)	-
RP (mag)	10.38^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	513±22^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 (V) = 2452129 + 513±22 x E^Ref

Cool component

Spectral type	M4 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	3500^Ref	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	93±1^Ref
Metallicity [Fe/H]	0.2±0.06^Ref			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	>0.8^Ref	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	75000^Ref	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

References

Allen, D. A., 1978, MNRAS, 184, 601, 1978MNRAS.184..601A
Gałan, C., Mikołajewska, J., Hinkle, K. H. et al., 2017, MNRAS, 466, 2, 2194, 2017MNRAS.466.2194G
Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
Munari, U., Buson, L. M., 1993, MNRAS, 263, 267, 1993MNRAS.263..267M
Munari, U., Valisa, P., Dallaporta, S. et al., 2012, ATel, 4403, 1, 2012ATel.4403....1M
Sanduleak, N., Stephenson, C. B., 1973, ApJ, 185, 899, 1973ApJ...185..899S

Last updated: April 18, 2022