09191-4128 CHR 239 (HD 80542)

09^h 19^m 04.43^s -41° 28' 05.6" P.A. 211.00 sep 0.1 mag 7.50,8.80 Sp G2V dist. 48.12 pc (156.97 l.y.)

Coord 2000	09191-4128	Discov num	CHR 239	Comp		Coord arcsec 2000	09 19 04.43 -41 28 05.6
Date first	1996	Date last	2021	Obs	19
Pa first	273	Pa last	210.8	P.A. Now (θ)	160.2°
Sep first	0.1	Sep last	0.131	Sep. Now (ρ)	0.102"
Mag pri	7.50	Mag sec	8.80	delta mag (ΔM)	1.3	Spectral class	G2V (yellow)
Pri motion ra	-052	Sec motion ra
Pri motion dec	-014	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 80542	Constellation	Vela	SAO	221055	HIP	45705
Tycho2	7686-00237-1	Gaia DR2	5427666174738393344	HD	80542	CD	CD-40 5108
CP	CP-40 3394	Distance	48.12	Distance ly	156.97

ORBITAL ELEMENTS

Period (P)	10.86y	± 0.02	Periastron (T)	2013.51y	± 0.02	Semi-major axis (a)	0.122a	± 0.001
Eccentricity (e)	0.394	± 0.006	Inclination (i)	147°	± 1.3	Longitude of periastron (ω)	260.1°	± 1.9
Node (Ω)	332.6°	± 2.3	Notes	n		Reference	Tok2014a
Equinox	2000		Last observation	2013		Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	197.2	0.125
2001	169.8	0.109
2002	126.8	0.079
2003	40.9	0.066
2004	342.4	0.101
2005	313.6	0.128
2006	292.7	0.140
2007	274.1	0.145
2008	255.8	0.144
2009	237.0	0.140
2010	216.7	0.134
2011	193.8	0.124
2012	165.2	0.106
2013	117.7	0.074
2014	29.1	0.069
2015	337.4	0.106
2016	310.4	0.130
2017	290.0	0.141
2018	271.5	0.145
2019	253.2	0.143
2020	234.2	0.139
2021	213.7	0.132
2022	190.3	0.122
2023	160.2	0.102
2024	107.4	0.070
2025	18.8	0.074
2026	332.8	0.110
2027	307.3	0.132
2028	287.3	0.142
2029	269.0	0.145
2030	250.6	0.143

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

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

WDS 09191-4128 CHR 239 (HD 80542) : NOTES

discov_num	notes	refcode
CHR 239	Astrometric binary; dm 2.4 mag, period ~ 10y? Accelerated pm	Tok2012b
	Omega for Tokovinin et al. (2014) orbit flipped by 180deg, at request
	of author.	Tok2014a

REFERENCES

refcode	metd	author	reference
Tok2012b	S j	Tokovinin, A.	2012AJ....144...56T
Tok2012b	+orb	AJ 144, 56, 2012
Tok2014a	orb j	Tokovinin, A., Mason, B.D., & Hartkopf, W.I.	2014AJ....147..123T
Tok2014a	+St	AJ 147, 123, 2014 (some measures corrected in Tok2017b)	2017AJ....154..110T

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
09191-4128	CHR 239		1996	1	93	0.1	7.50	8.80	G2V	D	091904.43-412805.6
09191-4128	CHR 239		2001	2	167	0.1	7.50	8.80	G2V	D	091904.43-412805.6
09191-4128	CHR 239		2011	3	12	0.1	7.50	8.80	G2V	D	091904.43-412805.6
09191-4128	CHR 239		2012	5	345	0.1	7.50	8.80	G2V	D	091904.43-412805.6
09191-4128	CHR 239		2013	6	288	0.1	7.50	8.80	G2V	D	091904.43-412805.6
09191-4128	CHR 239		2014	11	191	0.1	7.50	8.80	G2V	NO	091904.43-412805.6
09191-4128	CHR 239		2015	13	313	0.1	7.50	8.80	G2V	NO	091904.43-412805.6
09191-4128	CHR 239		2016	15	290	0.1	7.50	8.80	G2V	NO	091904.43-412805.6
09191-4128	CHR 239		2018	16	270	0.1	7.50	8.80	G2V	NO	091904.43-412805.6
09191-4128	CHR 239		2019	18	235	0.1	7.50	8.80	G2V	NO	091904.43-412805.6
09191-4128	CHR 239		2021	19	211	0.1	7.50	8.80	G2V	NO	091904.43-412805.6

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

WDS 09191-4128 CHR 239 (HD 80542) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 09191-4128 CHR 239 (HD 80542) : MEASURES

No records found.

WDS 09191-4128 (HD 80542) : VIRTUAL EYEPIECE

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WDS 09191-4128 (HD 80542) : ALADIN DSS IMAGE @ 09^h 19^m 04.43^s -41° 28' 05.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 09191-4128 CHR 239 (HD 80542) : 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		09191-4128	CHR 239		211	0.1
Show		09200-4119	TDS 527		173	1.4	14
Show		09199-4158	TDS6477		162	2.2	32
Show		09166-4053	TDS 524		359	1.2	45
Show		09201-4044	TDS6482		143	3.0	46
Show		09166-4204	TDS6438		212	1.4	46
Show		09182-4218	TDS6455		52	0.7	51
Show		09172-4041	WG 126		163	5.7	52
Show		09183-4221	DAM1593	BD	299	3.6	54
Show		09191-4031	HJ 4198	AB	350	13.4	57
Show		09191-4031	HJ 4198	AC	357	24.7	57
Show		09191-4031	HJ 4198	BC	5	11.5	57
Show		09198-4032	TDS6475		156	2.4	57
Show		09223-4041	RST1429		223	0.7	61
Show		09239-4106	SKF 189		228	87.7	61
Show		09131-4128	CPO 41	AB	329	23.1	68
Show		09131-4128	KPP2926	AC	327	23.2	68
Show		09131-4128	KPP2926	BC	253	1.6	68
Show		09250-4143	TDS 534		281	1.4	68
Show		09248-4205	CPO 261		75	4.7	74
Show		09239-4038	KPP2927		289	5.3	75
Show		09136-4216	TDS6406		311	1.8	78
Show		09143-4226	I 1129		145	1.6	79
Show		09251-4215	RSS 200		157	7.8	83
Show		09133-4223	TDS6400		114	0.6	85
Show		09182-4003	RST1425		307	2.2	85
Show		09150-4016	B 1649		28	2.0	86
Show		09168-4252	DON 330		210	0.9	88
Show		09211-4003	TDS6497		192	0.7	89
Show		09169-4256	DAM1590		160	3.0	92
Show		09168-4257	DAM1589		351	2.4	93
Show		09125-4032	B 1115		113	0.2	93
Show		09196-4302	KPP2925		10	2.6	95
Show		09264-4215	B 1122		240	0.2	95
Show		09118-4218	HDS1332		207	0.2	96
Show		09217-3957	RST1427		170	1.8	96
Show		09105-4116	LDS 254		105	5.8	97
Show		09234-4000	KPP2589		52	23.4	101
Show		09243-4006	TSN 51		12	33.0	102
Show		09282-4117	TDS6581	AB	41	1.9	104
Show		09282-4117	TDS6581	AC	32	8.1	104
Show		09237-4301	TDS6528		328	0.6	107
Show		09106-4221	I 1516		46	3.3	109
Show		09202-4318	TVB 218		243	5.3	111
Show		09290-4136	RST1432		153	1.7	113
Show		09097-4207	CPO 40		290	22.5	113
Show		09147-3945	WG 125		107	3.3	115
Show		09119-4251	TDS6386		86	0.5	116
Show		09144-4314	HJ 4191		13	5.9	118
Show		09278-4235	HDS1357	Aa,Ab	228	0.5	118
Show		09278-4235	HJ 4212	AB	64	20.8	118

WDS 09191-4128 : COMPONENTS

	A
B	pa=204.1° sep=0.12"

09191-4128 A

Componente originario normalizzato	AB	Name	HD 80542	Coord arcsec 2000	091904.43-412805.6	Mag	7.5
Spectral class	G2V (yellow)	PmRA	-52.00	PmDE	-14.0	SAO	221055
HIP	45705	Tycho2	7686-00237-1	HD	80542	CD	CD-40 5108
CP	CP-40 3394

Tycho2

Tycho2	7686-00237-1	Pflag		RAmdeg	139.76839713	DEmdeg	-41.46825830
PmRA	-23.2	PmDE	-14.3	E RAmdeg	5	E DEmdeg	5
E pmRA	0.9	E pmDE	0.9	EpRAm	1990.98	EpDEm	1991.19
Num	13	Q RAmdeg	1.6	Q DEmdeg	1.2	Q pmRA	1.6
Q pmDE	1.3	BTmag	8.731	E BTmag	0.016	VTmag	8.038
E VTmag	0.011	Prox	999	TYC	T	HIP	45705
CCDM		RAdeg	139.76846889	DEdeg	-41.46822528	EpRA 1990	1.61
EpDE 1990	1.69	E RAdeg	5.1	E DEdeg	4.9	Posflg
Corr	0.0

SAO

SAO	221055	DelFlag		RA1950		PmRA1950	-0.0046
DE1950		PmDE1950	-0.014	Vmag	8	SpType	G5
Double code		Source	48	CatNum	7239	DM	CP-40 3394
DMcomp		BDsup		HD	80542	M HD	0
GC		RA1950rad	2.43101042	DE1950rad	-0.72005694	PmRA2000	-0.004
PmDE2000	-0.011

Hipparcos

Catalog	H	HIP	45705	Proxy		RAhms	09 19 04.43
DEdms	-41 28 05.6	Vmag	7.95	VarFlag		R Vmag	H
RAdeg	139.768	DEdeg	-41.4682	AstroRef		Plx	21.52
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag	G	Source		Qual		M HIP
Theta		Rho		HD	80542	BD
CD	CD-40 5108	CP	CP-40 3394	Dm number	-40 5108	VIred	0.67
SpType	G2V	R SpType		Coord arcsec 2000	091904.43-412805.6

Hipparcos 2

HIP	45705	Sn	1	So	1	Nc	1
RArad	2.4394200062	DErad	-0.7237570407	Plx	20.78	PmRA	-17.95
PmDE	-35.28	E RArad	0.84	E DErad	0.88	E Plx	1.19
E pmRA	0.95	E pmDE	0.92	Hpmag	8.0858	E Hpmag	0.0013
SHp	0.015	VA	0	BV	0.626	E BV	0.009
VI	0.69

09191-4128 B

Componente originario normalizzato	AB		Coord arcsec 2000	091904.43-412805.7		Mag	8.8		Calc delta mag	1.3
Calc coord	yes