BI Cru

CONFIRMED MILKY WAY

Constellation
Crux

Equatorial coordinates
α = 12 23 25.975
δ = -62 38 15.979

Galactic coordinates
l = 299.7204°
b = 0.0592°

Suspected	1980^Ref
Confirmed	1980^Ref
Symbiotic IR type	D^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

BI Cru	IRAS 12206-6221	GSC2.4.2 S7LJ000780	AAVSO 000-BCV-592
SIMBAD V* BI Cru	Pan-STARRS -	SAO -	VSX 10855
GAIA DR3 6054612927609974656	SkyMapper -	WRAY 15-967	GCVS BI Cru
2MASS J12232601-6238159	HIP -	Hen 3-782	BD -
WISE J122325.97-623815.9	TYC 8979-1266-1	ESO -	HD -

Symbiotic Catalogs

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

Position

Right ascension (°)	185.8582^Ref	Parallax (mas)	0.317±0.021^Ref	Reddening E(B-V) (mag)	5.42±0.26^Ref ^{, Note}
Declination (°)	-62.6378^Ref	Distance (kpc)	2.3^Ref, 3.8±0.5^Ref, 2^Ref, 2.3^Ref 2.96^Ref ^{, Note}, 2.97^Ref ^{, Note}
Galactic longitude (°)	299.7204^Ref	Proper motion in α (mas/yr)	-7.98±0.02^Ref
Galactic latitude (°)	0.0592^Ref	Proper motion in δ (mas/yr)	0.57±0.02^Ref

Observations

X-Ray	Yes^Ref	IR type	D^Ref	Radio	Yes^Ref
X-Ray type	β/δ^Ref	J (mag)	7.33^Ref	Flickering	Yes?^Ref
GALEX FUV (mag)	-	H (mag)	6.19^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	5.06^Ref	Outburst type	-
IUE	Yes^Ref	WISE W1 (mag)	3.61^Ref	Jets	Yes?^Ref
FUSE	No^Ref	WISE W2 (mag)	1.20^Ref	Resolved nebula	Yes^Ref
U (mag)	12.06^Ref	WISE W3 (mag)	0.57^Ref	IPmax (eV)	75.5^Ref
B (mag)	12.18^Ref	WISE W4 (mag)	-0.58^Ref	[O III] lines	Yes^Ref
V (mag)	11.03^Ref	IRAS 12μm (Jy)	17.30^Ref	He II lines	Yes^Ref
R (mag)	10.71^Ref	IRAS 25μm (Jy)	15.30^Ref	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	11.80^Ref	O VI lines	No^Ref
BP (mag)	11.45^Ref	IRAS 100μm (Jy)	119.00^Ref
G (mag)	10.46^Ref	AKARI S09 (Jy)	13.23^Ref
RP (mag)	9.39^Ref	AKARI S18 (Jy)	9.81^Ref

Orbit

Orbital period (days)	-	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	-

Cool component

Spectral type	M0-1 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	D^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	280^Ref, 274±2^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	Max (JHKL) = 2443291 + 274±2 x E^Ref

Hot component

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

Links

SIMBAD CDS Portal

Notes

References

Fuhrmann, B., 1981, MitVS, 9, 48, 1981MitVS...9...48F
Gromadzki, M., Mikołajewska, J., Whitelock, P. et al., 2009, AcA, 59, 2, 169, 2009AcA....59..169G
Harries, T. J., 1996, A&A, 315, 499, 1996A&A...315..499H
Henize, K. G., Carlson, E. D., 1980, PASP, 92, 479, 1980PASP...92..479H
Luna, G. J. M., Sokoloski, J. L., Mukai, K. et al., 2013, A&A, 559, A6, 2013A&A...559A...6L
McCollum, B., Bruhweiler, F. C., Wahlgren, G. M. et al., 2008, ApJ, 682, 2, 1087, 2008ApJ...682.1087M
Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Rossi, C., Altamore, A., Ferrari-Toniolo, M. et al., 1988, A&A, 206, 279, 1988A&A...206..279R
Schwarz, H. E., Corradi, R. L. M., 1992, A&A, 265, L37, 1992A&A...265L..37S
Whitelock, P. A., Feast, M. W., Roberts, G. et al., 1983, MNRAS, 205, 1207, 1983MNRAS.205.1207W

Last updated: January 12, 2024