New Online Database of Symbiotic Variables: LAMOST J024540.72+502142.2

Constellation
Perseus

Equatorial coordinates
α = 02 45 40.702
δ = +50 21 39.577

Galactic coordinates
l = 140.8927°
b = -8.4841°

Suspected	2023^Ref
Confirmed	-
Symbiotic IR type	-
Hot component type	accreting-only^Ref
Outbursts	-

Identifiers

LAMOST J024540.72+502142.2	IRAS 02422+5008	GSC2.4.2 NCHY000141	AAVSO -
SIMBAD IRAS 02422+5008	Pan-STARRS 168430414195893921	SAO -	VSX -
GAIA DR3 439039841993338880	SkyMapper -	WRAY -	GCVS -
2MASS J02454068+5021397	HIP -	Hen -	BD -
WISE J024540.70+502139.6	TYC 3304-1690-1	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 (°)	41.4196^Ref	Parallax (mas)	0.571±0.030^Ref	Reddening E(B-V) (mag)	0.28±0.01^Ref ^{, Note}
Declination (°)	50.3610^Ref	Distance (kpc)	1.63^Ref ^{, Note}, 1.61^Ref ^{, Note}
Galactic longitude (°)	140.8927^Ref	Proper motion in α (mas/yr)	0.51±0.03^Ref
Galactic latitude (°)	-8.4841^Ref	Proper motion in δ (mas/yr)	-3.37±0.03^Ref

Observations

X-Ray	-	IR type	-	Radio	-
X-Ray type	-	J (mag)	6.27^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	5.35^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	5.05^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	4.94^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	4.83^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	4.92^Ref	IPmax (eV)	-
B (mag)	12.55^Ref	WISE W4 (mag)	4.77^Ref	[O III] lines	-
V (mag)	10.50^Ref	IRAS 12μm (Jy)	0.48^Ref	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	0.25^Ref	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	0.40^Ref	O VI lines	-
BP (mag)	10.94^Ref	IRAS 100μm (Jy)	1.82^Ref
G (mag)	9.37^Ref	AKARI S09 (Jy)	0.63^Ref
RP (mag)	8.16^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-33.84±0.16^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	-

Cool component

Spectral type	M4^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	-	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

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

Links

SIMBAD CDS Portal

Notes

Suspected of having a symbiotic nature by Jia et al. (2023) based on the machine-learning search. The spectra from the SDSS survey suggest an accreting-only nature.

References

Jia, Y., Guo, S., Zhu, C. et al., 2023, RAA, 23, 10, 105012, 2023RAA....23j5012J

LAMOST J024540.72+502142.2