02104-5049 ESG 1

02^h 10^m 25.98^s -50° 49' 25.2" P.A. 82.00 sep 2.6 mag 6.17,13.20 Sp K0V+DQ6 dist. 10.78 pc (35.16 l.y.)

Coord 2000	02104-5049	Discov num	ESG 1	Comp		Coord arcsec 2000	02 10 25.98 -50 49 25.2
Date first	2000	Date last	2016	Obs	10
Pa first	119	Pa last	82.1	P.A. Now (θ)	82.1°
Sep first	1.7	Sep last	2.622	Sep. Now (ρ)	2.622"
Mag pri	6.17	Mag sec	13.20	delta mag (ΔM)	7.03	Spectral class	K0V+DQ6 (yellow-orange/white dwarf)
Pri motion ra	+209	Sec motion ra
Pri motion dec	+065	Sec motion dec
Notes	N O P (See Notes, Orbital solution, 100-year proper motion)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation	Eridanus	SAO	232658	HIP	10138	Tycho2	8048-01022-1
HD	13445	HR	637	GC	2610	GL	Gl 86
CD	CD-51 532	CP	CP-51 282	Distance	10.78	Distance ly	35.16

ORBITAL ELEMENTS

Period (P)	341.5y	Periastron (T)	2000.5y	Semi-major axis (a)	4.393a
Eccentricity (e)	0.49	Inclination (i)	125.4°	Longitude of periastron (ω)	306.4°
Node (Ω)	79.6°	Notes	n	Reference	Msn2017c
Equinox	2000	Last observation	2012	Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	119.6	1.662
2001	116.0	1.720
2002	112.6	1.780
2003	109.5	1.841
2004	106.6	1.903
2005	103.8	1.965
2006	101.2	2.026
2007	98.8	2.086
2008	96.5	2.144
2009	94.3	2.201
2010	92.3	2.256
2011	90.3	2.309
2012	88.4	2.360
2013	86.6	2.408
2014	84.9	2.454
2015	83.2	2.497
2016	81.6	2.538
2017	80.0	2.577
2018	78.5	2.613
2019	77.0	2.646
2020	75.5	2.678
2021	74.1	2.706
2022	72.7	2.733
2023	71.4	2.758
2024	70.0	2.781
2025	68.7	2.801
2026	67.4	2.820
2027	66.1	2.837
2028	64.9	2.853
2029	63.6	2.867
2030	62.4	2.879

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

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

WDS 02104-5049 ESG 1 : NOTES

discov_num	notes	refcode
ESG 1	Gl 86. Magnitudes are K magnitudes of Lagrange et al. (2006).
	Lagrange et al. (2006) give two possible orbital solutions, based on	Lgr2006
	different assumed masses (70 Mjup and 0.5 Msun) for the secondary.
	Semi-major axes converted from au (47.58 and 18.42 au, respectively)
	to arcseconds assuming an Hipparcos-based distance of 10.9 pc.
	JHK photometry of primary from 2MASS, that of secondary transformed
	from NACO to 2MASS filters.
	2001.7454: PA is measured in zenith mode. If data collected in
	equatorial mode, PA = 112.1.	Rbr2011d
	Farihi et al. (2013) derive a mass of 0.59 +/- 0.01 Msun and
	Teff = 8180 +/- 120K for the white dwarf companion to GJ 86. Monte
	Carlo simulations yield the following orbital constraints:
	P = 120-481y, T0 = 1933-2067, e = 0.00-0.61, i = 114.7-122.6deg,
	a = 2.57-6.47" (27.8-69.8 au) Omega = 63.7-76.1deg, omega=0-358deg.
	The upper ranges of P and a are considered less likely.	Far2013
GJ 86	A: Combined solution, based on reduction of Hipparcos intermediate
	astrometric data together with spectroscopic elements from Queloz	Que2000
	et al. (2000).	HaI2001

REFERENCES

refcode	metd	author	reference
Far2013	Ha j	Farihi, J., Bond, H.E., Dufour, P., Haghighipour, N., Schaefer, G.H.,	2013MNRAS.430..652F
Far2013	+Hp	Holberg, J.B., Barstow, M.A., & Burleigh, M.R.
Far2013		MNRAS 430, 652, 2013
HaI2001	-	Han, I., Black, D., & Gatewood, G.	2001ApJ...548L..57H
HaI2001		ApJ 548, L57, 2001
Lgr2006	Ao j	Lagrange, A.-M., Beust, H., Udry, S., Chauvin, G., & Mayor, M.	2006A&A...459..955L
Lgr2006		A&A 459, 955, 2006
Msn2017c	orb -	Mason, B.D. & Hartkopf, W.I.	2017IAUDS.192....1M
Msn2017c		Inf. Circ. 192, 1, 2017
Que2000	Xh -	Queloz, D., Mayor, M., Weber, L., Blecha, A., Burnet, M., Confino, B., Naef, D.,	2000A&A...354...99Q
Que2000		Pepe, F., et al.
Que2000		A&A 354, 99, 2000
Rbr2011d	A j	Roberts, L.C., Jr., Turner, N.H., ten Brummelaar, T.A., Mason, B.D., &	2011AJ....142..175R
Rbr2011d		AJ 142, 175, 2011

DISCOVERER

idgroup	discov	author
1	ESG	Els, S., Sterzik, M., Marchis, F., Pantin, E., Endl, M., & Kurster, M.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
02104-5049	ESG 1		2005	4	103	2.0	4.79	14.20		NVDP	021025.98-504925.2
02104-5049	ESG 1		2012	7	89	2.4	6.17	13.20	K0V DQ6	NO P	021025.98-504925.2
02104-5049	ESG 1		2016	8	83	2.6	6.17	13.20	K0V+DQ6	NO P	021025.98-504925.2

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

WDS 02104-5049 ESG 1 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 02104-5049 ESG 1 : MEASURES

No records found.

WDS 02104-5049 : VIRTUAL EYEPIECE

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WDS 02104-5049 : ALADIN DSS IMAGE @ 02^h 10^m 25.98^s -50° 49' 25.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 02104-5049 ESG 1 : 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		02104-5049	ESG 1		82	2.6
Show		02122-5031	KPP1975		354	15.6	26
Show		02129-5035	KPP3482		90	20.6	28
Show		02055-5037	LDS 69		292	9.4	48
Show		02047-5028	DAW 115		38	1.2	59
Show		02043-5109	HDS 276		317	0.8	62
Show		02166-5026	TOK 185		200	0.1	64
Show		02032-5048	NSN 218		121	3.1	69
Show		02143-4952	TOK 815		238	0.1	69
Show		02097-5158	NZO 2		188	3.2	70
Show		02165-5131	DUN 6	AB	224	89.1	71
Show		02165-5131	SHY 137	AC	208	999.9	71
Show		02165-5131	SHY 137	AD	228	999.9	71
Show		02023-5044	HU 1559		94	0.6	77
Show		02023-5030	HDS 273		137	0.4	81
Show		02051-4941	B 1431		25	7.3	86
Show		02091-5215	VOU 84		216	9.1	87
Show		02192-5026	KPP2843		35	1.6	87
Show		02115-4920	HJ 3485		137	4.5	91
Show		02008-5056	KPP3472	AB	203	8.3	92
Show		02166-4934	HJ 3493		243	8.5	96
Show		01598-5034	RST 45		263	0.4	102
Show		02080-4907	I 1140		32	1.3	106
Show		02033-5212	UC 675		152	29.3	107
Show		01592-5009	B 1429		353	0.9	115
Show		02229-5106	EHR 1		154	2.3	119
Show		02223-5011	HDS 309		270	0.8	120
Show		02197-5218	RSS 56		2	9.1	125
Show		01571-5031	VOU 20		261	0.4	129
Show		02230-4957	UC 729		145	77.0	131
Show		02183-4902	UC 714		321	14.5	132
Show		02019-5235	RST 47		317	1.3	132
Show		01567-5028	HU 1556		344	0.6	133
Show		02053-5253	FIN 80		275	1.1	133
Show		02006-5231	KPP1160		282	9.1	137
Show		02018-5244	RST 46		99	4.0	140
Show		02176-5255	WIS 59		285	26.4	143
Show		01560-5137	HJ 3473		208	2.6	144
Show		02235-5208	I 1142		40	3.7	145
Show		02073-5312	CAB 5		104	705.9	146
Show		01575-5212	RST 43	BC	30	0.4	147
Show		01575-5212	COO 10	A,BC	33	3.5	147
Show		02210-5242	FIN 81		65	0.9	150
Show		02004-5247	UC 657		231	34.0	150
Show		02261-5124	SKF 947		301	43.0	152
Show		02225-5237	TDS2233		228	0.6	155
Show		01531-5057	RST5562		181	5.3	165
Show		02125-5334	WIS 57		45	50.7	166
Show		02267-5156	TDS2254		330	0.5	166
Show		02246-4901	RST5563	AB	118	3.7	175
Show		02277-5201	BRT2019		220	5.1	177

WDS 02104-5049 : COMPONENTS

	A
B	pa=77.6° sep=1.68"

02104-5049 A

Componente originario normalizzato	AB	Coord arcsec 2000	021025.98-504925.2	Mag	6.17	Spectral class	K0V (yellow-orange)
PmRA	209.00	PmDE	65.0	SAO	232658	HIP	10138
Tycho2	8048-01022-1	HD	13445	HR	637	GC	2610
CD	CD-51 532	CP	CP-51 282

Tycho2

Tycho2	8048-01022-1	Pflag		RAmdeg	32.60826756	DEmdeg	-50.82368251
PmRA	2150.3	PmDE	673.2	E RAmdeg	4	E DEmdeg	4
E pmRA	2.5	E pmDE	2.4	EpRAm	1991.60	EpDEm	1991.75
Num	4	Q RAmdeg	1.2	Q DEmdeg	0.8	Q pmRA	1.2
Q pmDE	0.7	BTmag	7.148	E BTmag	0.015	VTmag	6.209
E VTmag	0.010	Prox	999	TYC		HIP	10138
CCDM		RAdeg	32.60035278	DEdeg	-50.82521944	EpRA 1990	1.63
EpDE 1990	1.78	E RAdeg	3.7	E DEdeg	3.6	Posflg
Corr	0.1

SAO

SAO	232658	DelFlag		RA1950		PmRA1950	0.2244
DE1950		PmDE1950	0.655	Vmag	6.3	SpType	G5
Double code		Source	70	CatNum	2610	DM	CD-51 532
DMcomp		BDsup		HD	13445	M HD	0
GC	2610	RA1950rad	0.56030637	DE1950rad	-0.89131637	PmRA2000	0.2237
PmDE2000	0.642

Hipparcos

Catalog	H	HIP	10138	Proxy		RAhms	02 10 24.00
DEdms	-50 49 31.1	Vmag	6.12	VarFlag		R Vmag	G
RAdeg	32.6	DEdeg	-50.8253	AstroRef		Plx	91.63
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	13445	BD
CD	CD-51 532	CP	CP-51 282	Dm number	-51 532	VIred	0.88
SpType	K0V	R SpType		Coord arcsec 2000	021024.00-504931.1

Hipparcos 2

HIP	10138	Sn	5	So	0	Nc	1
RArad	0.5689774631	DErad	-0.8870690913	Plx	92.74	PmRA	2092.86
PmDE	653.21	E RArad	0.23	E DErad	0.26	E Plx	0.32
E pmRA	0.27	E pmDE	0.3	Hpmag	6.2571	E Hpmag	0.0006
SHp	0.008	VA	0	BV	0.812	E BV	0.015
VI	0.88

02104-5049 B

Componente originario normalizzato	AB		Coord arcsec 2000	021026.15-504924.8		Mag	13.2		Spectral class	DQ6 (white dwarf)
Calc delta mag	7.03		Calc coord	yes