Y CrA

CONFIRMED MILKY WAY

Constellation
Corona Australis

Equatorial coordinates
α = 18 14 22.947
δ = -42 50 32.335

Galactic coordinates
l = 350.6096°
b = -11.8301°

Suspected	1954^Ref
Confirmed	1978^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Y CrA	IRAS Z18107-4251	GSC2.4.2 S9OH000378	AAVSO 000-BCV-508
SIMBAD V* Y CrA	Pan-STARRS -	SAO -	VSX 9879
GAIA DR3 6724477948585772800	SkyMapper 181422.94-425032.2	WRAY 16-391	GCVS Y CrA
2MASS J18142295-4250324	HIP -	Hen 3-1632	BD -
WISE J181422.94-425032.3	TYC -	ESO -	HD 166813

Symbiotic Catalogs

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

Position

Right ascension (°)	273.5956^Ref	Parallax (mas)	0.278±0.034^Ref	Reddening E(B-V) (mag)	0.12±0.0^Ref ^{, Note}
Declination (°)	-42.8423^Ref	Distance (kpc)	5^Ref 3.42^Ref ^{, Note}, 3.51^Ref ^{, Note}
Galactic longitude (°)	350.6096^Ref	Proper motion in α (mas/yr)	-2.42±0.04^Ref
Galactic latitude (°)	-11.8301^Ref	Proper motion in δ (mas/yr)	-0.98±0.03^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	7.77^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	6.84^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	6.48^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.31^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	6.25^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	5.94^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	5.55^Ref	[O III] lines	Yes^Ref
V (mag)	13.30^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	13.13^Ref	IRAS 100μm (Jy)	-
G (mag)	11.56^Ref	AKARI S09 (Jy)	0.22^Ref
RP (mag)	10.23^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	1619±35.8^Ref	γ velocity (km/h)	-49.04±0.31^Ref, -48.68±2.20^Ref	Size of giant’s orbit (AU)	0.8^Ref
Eccentricity	0.173±0.088^Ref	RV of giant (km/h)	5.55±0.43^Ref	Separation (AU)	-
Inclination (°)	-	Inferior conj. of giant (JD)	-	Mass function	0.0275^Ref
Eclipses	-			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	M5 III^Ref, M6 III^Ref, M6 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	3235^Ref, 3300^Ref	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	84±1^Ref
Metallicity [Fe/H]	-0.4±0.06^Ref			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	0.011^Ref	Accretion disk	-
Eff. temperature (K)	130000-140000^Ref, 190000^Ref	Luminosity (L_⊙)	260^Ref, 140^Ref
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Classified as a symbiotic system by Bidelman (1954) due to the detected significant variability (Pickering et al., 1901) and a peculiar emission-line spectrum (Fleming & Pickering, 1912; Cannon & Pickering, 1916; Payne, 1930).

References

Allen, D. A., 1978, MNRAS, 184, 601, 1978MNRAS.184..601A
Allen, D. A., 1980, MNRAS, 192, 521, 1980MNRAS.192..521A
Bidelman, W. P., 1954, ApJS, 1, 175, 1954ApJS....1..175B
Cannon, A. J., Pickering, E. C., 1916, AnHar, 76, 3, 19, 1916AnHar..76...19C
Fekel, F. C., Hinkle, K. H., Joyce, R. R. et al., 2010, AJ, 139, 4, 1315, 2010AJ....139.1315F
Fleming, W. P. S., Pickering, E. C., 1912, AnHar, 56, 6, 165, 1912AnHar..56..165F
Gałan, C., Mikołajewska, J., Hinkle, K. H. et al., 2016, MNRAS, 455, 2, 1282, 2016MNRAS.455.1282G
Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
Gutiérrez-Moreno, A., Moreno, H., Costa, E., 1999, PASP, 111, 759, 571, 1999PASP..111..571G
Henize, K. G., 1967, ApJS, 14, 125, 1967ApJS...14..125H
Luna, G. J. M., Sokoloski, J. L., Mukai, K. et al., 2013, A&A, 559, A6, 2013A&A...559A...6L
Medina Tanco, G. A., Steiner, J. E., 1995, AJ, 109, 1770, 1995AJ....109.1770M
Mürset, U., Schmid, H. M., 1999, A&AS, 137, 473, 1999A&AS..137..473M
Payne, C. H., 1930, BHarO, 878, 1, 1930BHarO.878....1P
Pickering, E. C., Colson, H. R., Fleming, W. P. et al., 1901, ApJ, 13, 226, 1901ApJ....13..226P
Sanduleak, N., Stephenson, C. B., 1973, ApJ, 185, 899, 1973ApJ...185..899S

Last updated: April 18, 2022