New Online Database of Symbiotic Variables: TCP J18224935-2408280

Constellation
Sagittarius

Equatorial coordinates
α = 18 22 49.446
δ = -24 08 29.338

Galactic coordinates
l = 8.2654°
b = -4.8967°

Suspected	2021^Ref
Confirmed	2021^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref - Z And^Ref

Identifiers

TCP J18224935-2408280	IRAS -	GSC2.4.2 S9TG043907	AAVSO 000-BNZ-753
SIMBAD 2MASS J18224944-2408291	Pan-STARRS 79032757060320579	SAO -	VSX 2222767
GAIA DR3 4089297564356878720	SkyMapper 182249.37-240829.0	WRAY -	GCVS -
2MASS J18224944-2408291	HIP -	Hen -	BD -
WISE J182249.43-240829.1	TYC -	ESO -	HD -

Symbiotic Catalogs

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

Position

Right ascension (°)	275.7060^Ref	Parallax (mas)	0.057±0.024^Ref	Reddening E(B-V) (mag)	0.55±0.02^Ref ^{, Note}
Declination (°)	-24.1415^Ref	Distance (kpc)	8.09^Ref ^{, Note}, 7.57^Ref ^{, Note}
Galactic longitude (°)	8.2654^Ref	Proper motion in α (mas/yr)	-3.77±0.03^Ref
Galactic latitude (°)	-4.8967^Ref	Proper motion in δ (mas/yr)	-6.18±0.02^Ref

Observations

X-Ray	-	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	10.37^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	9.65^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	9.28^Ref	Outburst type	Z And^Ref
IUE	No^Ref	WISE W1 (mag)	9.38^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	9.41^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	8.99^Ref	IPmax (eV)	114^Ref
B (mag)	16.44^Ref	WISE W4 (mag)	8.17^Ref	[O III] lines	Yes^Ref
V (mag)	15.14^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	12.94^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	15.68^Ref	IRAS 100μm (Jy)	-
G (mag)	14.36^Ref	AKARI S09 (Jy)	-
RP (mag)	13.16^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	631.25±2.93^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(g) = 2457541.7±5.78 + 631.25±2.93 x E^Ref

Cool component

Spectral type	K5-M0^Ref, M1-2^Ref	Mass (M_⊙)	0.98±0.13^Ref	Pulsation	-
Eff. temperature (K)	3614±60^Ref	Radius (R_⊙)	69±6.8^Ref	Type	-
IR type	S^Ref	Luminosity (L_⊙)	708.2±251.65^Ref	Pulsation period (days)	-
Metallicity [Fe/H]	-0.09±0.1^Ref			Pulsation ephemeris	-

Hot component

Type/Spectral type	WD^Ref	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	0.03-0.055^Ref	Accretion disk	-
Eff. temperature (K)	148600-165600^Ref	Luminosity (L_⊙)	530-1830^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

Discovered in outburst in 2021, the symbiotic nature of the system was confirmed through spectroscopic observations reported in Merc et al. (2021). A comprehensive study of the system was subsequently published by Sonith & Kamath (2023).

References

Aydi, E., Sokolovsky, K. V., Strader, J. et al., 2021, ATel, 14692, 1, 2021ATel14692....1A
Merc, J., Gális, R., Charbonnel, S. et al., 2021, ATel, 14691, 1, 2021ATel14691....1M
Sonith, L. S., Kamath, U. S., 2023, MNRAS, 526, 4, 6381, 2023MNRAS.526.6381S
Taguchi, K., Maehara, H., Fujii, M. et al., 2021, ATel, 14699, 1, 2021ATel14699....1T

TCP J18224935-2408280