22156-4121 CHR 187 (Mu1 Gru)

22^h 15^m 36.88^s -41° 20' 48.3" P.A. 263.00 sep 0.2 mag 6.68,5.20 Sp G8III dist. 84.25 pc (274.82 l.y.)

Coord 2000	22156-4121	Discov num	CHR 187	Comp		Coord arcsec 2000	22 15 36.88 -41 20 48.3
Date first	1991	Date last	2021	Obs	15
Pa first	76	Pa last	263.1	P.A. Now (θ)	276.8°
Sep first	0.1	Sep last	0.162	Sep. Now (ρ)	0.128"
Mag pri	6.68	Mag sec	5.20	delta mag (ΔM)	1.48	Spectral class	G8III (yellow)
Pri motion ra	+044	Sec motion ra
Pri motion dec	+022	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	Mu1 Gru	Constellation	Grus	SAO	231055	HIP	109908
Tycho2	7999-01569-1	Gaia DR2	6569894104123050752	HD	211088	HR	8486
GC	31125	CD	CD-4114810	CP	CP-41 9761	Bayer	Mu 1 Gruis
Bayer name	Mu1 Gru	FK5	3777	Distance	84.25	Distance ly	274.82
Bayer greek	μ¹ Gru

ORBITAL ELEMENTS

Period (P)	19.31y	Periastron (T)	1991.67y	Semi-major axis (a)	0.168a
Eccentricity (e)	0	Inclination (i)	68.3°	Longitude of periastron (ω)	0°
Node (Ω)	77.1°	Notes	n	Reference	Tok2018i
Equinox	2000	Last observation	2018	Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	247.4	0.155
2001	254.9	0.167
2002	261.8	0.165
2003	269.7	0.147
2004	280.8	0.118
2005	300.3	0.084
2006	339.5	0.063
2007	24.5	0.075
2008	48.8	0.108
2009	61.6	0.139
2010	70.1	0.161
2011	77.2	0.168
2012	84.4	0.160
2013	93.0	0.138
2014	106.1	0.107
2015	131.1	0.074
2016	176.7	0.063
2017	215.0	0.086
2018	234.0	0.120
2019	244.8	0.148
2020	252.7	0.165
2021	259.6	0.167
2022	267.1	0.154
2023	276.8	0.128
2024	292.8	0.095
2025	324.8	0.066
2026	12.6	0.068
2027	43.0	0.097
2028	58.3	0.130
2029	67.7	0.155
2030	75.1	0.167

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 22156-4121 CHR 187 (Mu1 Gru) : NOTES

discov_num	notes	refcode
CHR 187	Abt & Biggs (1972) note variable RV.	AbH1972

REFERENCES

refcode	metd	author	reference
AbH1972	-	Abt. H.A. & Biggs, E.S.	1972bsrv.book.....A
AbH1972		Bibliography of Stellar Radial Velocities
Tok2018i	orb -	Tokovinin, A.	2018IAUDS.196....1T
Tok2018i		Inf. Circ. 196, 1, 2018

DISCOVERER

idgroup	discov	author
1	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
22156-4121	CHR 187		1992	2	83	0.2	6.68	5.20	G8III	N	221536.88-412048.3
22156-4121	CHR 187		2008	5	236	0.1	6.68	5.20	G8III	N	221536.88-412048.3
22156-4121	CHR 187		2013	6	102	0.1	6.68	5.20	G8III	N	221536.88-412048.3
22156-4121	CHR 187		2014	8	130	0.1	6.68	5.20	G8III	NO	221536.88-412048.3
22156-4121	CHR 187		2015	10	288	0.0	6.68	5.20	G8III	NO	221536.88-412048.3
22156-4121	CHR 187		2017	12	225	0.1	6.68	5.20	G8III	NO	221536.88-412048.3
22156-4121	CHR 187		2018	13	240	0.1	6.68	5.20	G8III	NO	221536.88-412048.3
22156-4121	CHR 187		2019	14	249	0.2	6.68	5.20	G8III	NO	221536.88-412048.3
22156-4121	CHR 187		2021	15	263	0.2	6.68	5.20	G8III	NO	221536.88-412048.3

If you need more information about this double, apply for a data request form to the WDS.

WDS 22156-4121 CHR 187 (Mu1 Gru) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 22156-4121 CHR 187 (Mu1 Gru) : MEASURES

No records found.

WDS 22156-4121 (Mu1 Gru) : VIRTUAL EYEPIECE

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WDS 22156-4121 (Mu1 Gru) : ALADIN DSS IMAGE @ 22^h 15^m 36.88^s -41° 20' 48.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 22156-4121 CHR 187 (Mu1 Gru) : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		22156-4121	CHR 187		263	0.2
Show		22173-4123	SKF1106		184	7.9	19
Show		22140-4116	UC 4686		143	22.0	19
Show		22164-4138	CRU9038		142	96.3	20
Show		22131-4145	CRU9034		207	104.8	38
Show		22137-4046	CRU9035	AB	182	80.3	42
Show		22137-4046	CRU9035	AC	76	45.7	42
Show		22124-4155	SKF1105		345	42.9	50
Show		22159-4217	CRU9037		354	46.7	57
Show		22140-4027	CRU9036		36	83.9	57
Show		22209-4126	MOC 15		193	0.2	61
Show		22214-4128	TDT3481		83	0.9	66
Show		22100-4147	B 552		284	0.7	69
Show		22207-4203	DON1026		315	1.1	72
Show		22096-4059	I 1452		125	1.1	72
Show		22216-4147	DON1028		197	0.6	72
Show		22118-4011	CRU9033	AB	74	115.6	83
Show		22118-4011	CRU9033	AC	95	156.5	83
Show		22227-4152	DON1030	AB	189	1.3	86
Show		22227-4152	CRU9040	AB,C	16	74.8	86
Show		22189-3956	CRU9039	AB	104	32.2	94
Show		22189-3956	DAM 823	BC	355	6.8	94
Show		22246-4127	JC 19	AB	59	14.8	102
Show		22246-4127	JC 19	AC	87	91.0	102
Show		22246-4127	CRU9041	AD	37	237.0	102
Show		22202-4259	NSN 465		292	0.9	111
Show		22250-4202	HJ 5332		244	12.6	114
Show		22120-4308	RSS 568		54	9.7	115
Show		22222-3949	KPP3091		112	3.3	119
Show		22096-4305	TDT3377		248	0.5	124
Show		22261-4202	UC 4744		223	57.2	125
Show		22221-4305	DON1029		237	0.4	128
Show		22064-4238	UC 4650		32	49.4	129
Show		22270-4118	I 1453		16	4.1	129
Show		22233-3945	SKF1108		27	82.2	130
Show		22241-3944	HJ 5330		273	5.6	138
Show		22038-4039	CPO 629		147	5.1	141
Show		22273-4027	COO 251		183	6.4	143
Show		22287-4115	CPO 631		200	4.0	148
Show		22043-4243	HJ 5314		55	12.8	151
Show		22234-4324	HDS3173		335	0.1	151
Show		22050-3942	SEE 466		250	1.8	156
Show		22183-3846	UC 4712		8	80.7	159
Show		22043-4259	TDT3322		50	0.5	161
Show		22086-3900	TVB 323		223	19.7	162
Show		22016-4204	CRU9032		76	49.7	164
Show		22020-4019	HDS3127		180	17.2	167
Show		22305-4126	TDT3554	AB	270	1.4	168
Show		22292-4012	CRU9042		89	21.0	169
Show		22254-3913	HDS3178		132	0.4	170
Show		22015-4025	TVB 321		161	10.3	170

WDS 22156-4121 : COMPONENTS

	A
B	pa=260.8° sep=0.12"

22156-4121 A

Componente originario normalizzato	AB	Name	Mu1 Gru	Coord arcsec 2000	221536.88-412048.3	Mag	6.68
Spectral class	G8III (yellow)	PmRA	44.00	PmDE	22.0	SAO	231055
HIP	109908	HD	211088	HR	8486	GC	31125
CD	CD-4114810	CP	CP-41 9761	Bayer	Mu 1 Gruis	Bayer name	Mu1 Gru
FK5	3777

SAO

SAO	231055	DelFlag		RA1950		PmRA1950	0.0045
DE1950		PmDE1950	0.03	Vmag	4.9	SpType	G0
Double code		Source	70	CatNum	31125	DM	CD-4114810
DMcomp		BDsup		HD	211088	M HD	0
GC	31125	RA1950rad	5.81461093	DE1950rad	-0.72599186	PmRA2000	0.0046
PmDE2000	0.026

Hipparcos

Catalog	H	HIP	109908	Proxy	H	RAhms	22 15 36.88
DEdms	-41 20 48.3	Vmag	4.79	VarFlag		R Vmag	G
RAdeg	333.904	DEdeg	-41.3468	AstroRef	*	Plx	12.44
CCDM	22156-4121	N CCDM	M	Nsys	1	Ncomp	2
MultFlag	C	Source	S	Qual	D	M HIP	BA
Theta	256	Rho	0.146	HD	211088	BD
CD	CD-4114810	CP	CP-41 9761	Dm number	-4114810	VIred	0.83
SpType	G8III+...	R SpType		Coord arcsec 2000	221536.88-412048.3

Hipparcos 2

HIP	109908	Sn	55	So	3	Nc	2
RArad	5.8277187112	DErad	-0.7216369277	Plx	11.87	PmRA	47.01
PmDE	22.5	E RArad	0.33	E DErad	0.34	E Plx	0.43
E pmRA	0.39	E pmDE	0.31	Hpmag	4.9496	E Hpmag	0.0008
SHp	0.005	VA	0	BV	0.79	E BV	0.021
VI	0.83

CCDM

Ccdm	22156-4121	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.93	DDEs	11.7
R dRAs	81	Year		Theta		Rho
Obs	2	Vmag	4.8	Sp	G8	PmNote	@
PmRA	44	PmDE	22	Dm number	-4114810	Cat1	CD
Name2	231055	Cat2	SAO	HD	211088	M HD
ADS BDS		M ADS BDS		N IDS	W	IDS	22156-4121A
HIC	109908

22156-4121 B

Componente originario normalizzato	AB		Coord arcsec 2000	221536.87-412048.3		Mag	5.2		Tycho2	7999-01569-1
Calc delta mag	1.48		Calc coord	yes

Tycho2

Tycho2	7999-01569-1	Pflag		RAmdeg	333.90383186	DEmdeg	-41.34669335
PmRA	45.2	PmDE	24.8	E RAmdeg	4	E DEmdeg	4
E pmRA	0.7	E pmDE	0.7	EpRAm	1991.01	EpDEm	1990.93
Num	17	Q RAmdeg	1.0	Q DEmdeg	1.5	Q pmRA	1.0
Q pmDE	1.6	BTmag	5.788	E BTmag	0.014	VTmag	4.887
E VTmag	0.009	Prox	999	TYC	T	HIP	109908
CCDM	AB	RAdeg	333.90369139	DEdeg	-41.34675222	EpRA 1990	1.59
EpDE 1990	1.42	E RAdeg	3.5	E DEdeg	3.7	Posflg	P
Corr	-0.3

CCDM

Ccdm	22156-4121	RComp		Comp	B	Note1
Note2		Discov num	CHR 187	DRAs		DDEs
R dRAs		Year	1992	Theta	83	Rho	0.2
Obs	1	Vmag		Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS	W	IDS	22156-4121B
HIC	109908