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10093+2020
A 2145
HD 88021

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Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

10093+2020 A 2145 (HD 88021)

10^h 09^m 19.63^s +20° 19' 56.6" P.A. 225.00 sep 0.2 mag 7.30,7.50 Sp F5+A2 dist. 290.7 pc (948.26 l.y.)

Coord 2000	10093+2020	Discov num	A 2145	Comp		Coord arcsec 2000	10 09 19.63 +20 19 56.6
Date first	1910	Date last	2019	Obs	91
Pa first	195	Pa last	224.6	P.A. Now (θ)	228°
Sep first	0.2	Sep last	0.231	Sep. Now (ρ)	0.223"
Mag pri	7.30	Mag sec	7.50	delta mag (ΔM)	0.2	Spectral class	F5+A2 (yellow-white/white)
Pri motion ra	-027	Sec motion ra
Pri motion dec	-019	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 88021	Constellation	Leo	SAO	81208	HIP	49747
Tycho2	1425-01393-1	Gaia DR2	628411856378018560	HD	88021	GC	13941
ADS	7662	BD	BD+21 2156	Distance	290.7	Distance ly	948.26

ORBITAL ELEMENTS

Period (P)	83.5y	± 0.12	Periastron (T)	1992.11y	± 0.04	Semi-major axis (a)	0.158a	± 0.001
Eccentricity (e)	0.827	± 0.002	Inclination (i)	139°	± 0.4	Longitude of periastron (ω)	125.1°	± 0.3
Node (Ω)	172°	± 0.4	Notes	n		Reference	Gur2021
Equinox			Last observation			Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000	268.2	0.104
2001	264.2	0.112
2002	260.8	0.119
2003	257.8	0.127
2004	255.1	0.134
2005	252.7	0.140
2006	250.4	0.147
2007	248.4	0.153
2008	246.5	0.159
2009	244.8	0.165
2010	243.2	0.170
2011	241.6	0.176
2012	240.2	0.181
2013	238.9	0.186
2014	237.6	0.190
2015	236.3	0.195
2016	235.2	0.199
2017	234.0	0.203
2018	232.9	0.207
2019	231.9	0.211
2020	230.9	0.214
2021	229.9	0.217
2022	228.9	0.220
2023	228.0	0.223
2024	227.1	0.226
2025	226.2	0.229
2026	225.4	0.231
2027	224.5	0.233
2028	223.7	0.235
2029	222.9	0.237
2030	222.1	0.239

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

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

WDS 10093+2020 A 2145 (HD 88021) : NOTES

discov_num	notes	refcode
A 2145	Composite spectrum binary, classified G2III+A2V by Markowitz
	(1969 Dissertation, Ohio State Univ.), who quotes delta m = 1.1.
	It is not known which spectrum belongs to the visual primary.
	Only elements P and T have been amended by Starikova (1977) from the	Sta1977a
	second orbit of Baize (1957).	Baz1957a
	1983.9371, 1983.9372: Interferometric observations are in disaccord	Wor1983
	with the 1957 orbital elements of Baize (see Worley & Heintz 1983).	Bnu1984
	1984.1861, 1984.2814, 1985.2053: The speckle interferometric
	observations show that Finsen's orbit fails to describe the orbital	Fin1977a
	motion of this system.	Bnu1986
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
	masses of 13.28 +/- 8.31, 6.98, and 3.29 Msun, respectively.	Mlk2012

REFERENCES

refcode	metd	author	reference
Baz1957a	orb -	Baize, P.	1957JO.....40...17B
Baz1957a		J. Obs. 40, 17-28, 1957
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Bnu1984	S j	Bonneau, D., Carquillat, J.M., & Vidal, J.L.	1984A&AS...58..729B
Bnu1984		A&AS 58, 729, 1984
Bnu1986	S j	Bonneau, D., Balega, Y., Blazit, A, Foy, R., Vakili, F., & Vidal, J.L.	1986A&AS...65...27B
Bnu1986		A&AS 65, 27, 1986
Fin1977a	orb -	Finsen, W.S.	1977IAUDS..71....1F
Fin1977a		Inf. Circ. 71, 1, 1977
Gur2021	S+ j	Guerrero, C.A., Zepeda, C.E., Souza, T.B., Najera, M.R., Borges Fernandes, M.,	2021AJ....161..253G
Gur2021	+orb	Hernandez-Aguila, J.B., Carvajal, J.C., Castro-Chacon, J.H., Hernandez-Valencia, B.,
Gur2021	+not	Reyes-Ruiz, M., Sanchez, E. & Silva, J.S.
Gur2021		AJ 161, 253, 2021
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
Sta1977a	orb -	Starikova, G.A.	1977ATsir.961....7S
Sta1977a		Astron. Tsirk. #961, 7, 1977
Wor1983	-	Worley, C.E. & Heintz, W.D.	1983PUSNO..24g...1W
Wor1983		Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)

DISCOVERER

idgroup	discov	author
1	A	Aitken, R.G.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
10093+2020	A 2145		1995	82	291	0.1	7.30	7.50	F5+A2	NOD	100919.63+201956.6
10093+2020	A 2145		2008	83	239	0.1	7.30	7.50	F5 A2	NOD	100919.63+201956.6
10093+2020	A 2145		2012	84	232	0.2	7.30	7.50	F5 A2	NOD	100919.63+201956.6
10093+2020	A 2145		2014	86	229	0.2	7.30	7.50	F5+A2	NO	100919.63+201956.6
10093+2020	A 2145		2016	87	227	0.2	7.30	7.50	F5+A2	NO	100919.63+201956.6
10093+2020	A 2145		2018	88	226	0.2	7.30	7.50	F5+A2	NO	100919.63+201956.6
10093+2020	A 2145		2019	89	225	0.2	7.30	7.50	F5+A2	NO	100919.63+201956.6

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

WDS 10093+2020 A 2145 (HD 88021) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 10093+2020 A 2145 (HD 88021) : MEASURES

No records found.

WDS 10093+2020 (HD 88021) : VIRTUAL EYEPIECE

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

WDS 10093+2020 (HD 88021) : ALADIN DSS IMAGE @ 10^h 09^m 19.63^s +20° 19' 56.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 10093+2020 A 2145 (HD 88021) : 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		10093+2020	A 2145		225	0.2	1
Show		10081+2049	SLW 437		152	60.1	34
Show		10068+2020	NSN 599		292	1.3	36
Show		10120+2007	HJ 476		49	24.1	41
Show		10092+2116	A 2144	AB	287	2.7	56
Show		10125+1942	COU 288		2	0.6	60
Show		10139+2024	DAM2157		222	4.8	65
Show		10141+2014	DAM2164		94	5.3	68
Show		10121+2118	A 2146		180	0.1	70
Show		10197+1928	LDS3969	BC	10	5.2	79
Show		10117+2132	CVR1272		115	3.6	80
Show		10143+2104	BWL 25		320	0.1	84
Show		10092+2147	HJ 2520	AB	343	33.9	88
Show		10092+2147	COU 168	Ba,Bb	231	0.9	89
Show		10078+2150	CVR 101		25	28.3	93
Show		10119+1853	KPP 862		231	7.3	95
Show		10024+1959	SLW 424		72	130.0	101
Show		10027+1940	BRT2403		340	3.1	102
Show		10040+1909	CVR 100		307	110.3	104
Show		10052+1854	LAS 14		261	7.3	104
Show		10055+1849	HJ 473		292	21.1	106
Show		10168+1955	CVR1276		75	3.4	108
Show		10110+1834	COU 287		94	1.4	109
Show		10151+1907	STF1417		78	2.4	110
Show		10076+2207	COU 167	AB	120	1.8	110
Show		10076+2207	DAM2024	AC	147	17.7	110
Show		10020+2112	GRV 807		208	71.7	115
Show		10041+1848	TOK 889		7	0.1	119
Show		10073+2215	COU 166		159	2.4	119
Show		10178+2000	A 2149	AB	306	1.5	121
Show		10178+2000	A 2149	AC	194	9.6	121
Show		10178+2000	GII 170	Aa,Ab	96	0.2	121
Show		10014+1921	COU 25		100	10.0	127
Show		10126+1820	ZHN 15		67	435.1	129
Show		10002+2058	CHE 146		36	29.7	134
Show		09597+1952	UC 1857		248	44.3	138
Show		10059+2241	POU3072		282	4.1	140
Show		10192+2034	STF1423		308	0.7	140
Show		10192+2008	CVR1280		275	3.3	140
Show		10140+2227	COU 169	Aa,Ab	322	0.5	144
Show		10140+2227	UC 1897	AB	307	35.8	144
Show		10086+1756	SLW 439		3	162.8	145
Show		09590+2012	SLW 417		236	40.3	145
Show		10098+2246	CVR 552		304	17.9	146
Show		10200+1950	BAG 32	Ca,Cb	24	0.2	148
Show		10200+1950	STF1424	CD	6	90.7	148
Show		10200+1950	FYM 38	CE	59	148.6	148
Show		10200+1950	FYM 38	CF	238	53.4	148
Show		10174+2156	CVR 554		233	19.8	149
Show		10176+2155	LDS3973		53	15.0	151
Show		09596+2122	CHE 145		122	27.2	151

WDS 10093+2020 : COMPONENTS

	A
B	pa=222.8° sep=0.22"

10093+2020 A

Componente originario normalizzato	AB	Name	HD 88021	Coord arcsec 2000	100919.63+201956.6	Mag	7.3
Spectral class	F5 (yellow-white)	PmRA	-27.00	PmDE	-19.0	SAO	81208
HIP	49747	Tycho2	1425-01393-1	HD	88021	GC	13941
BD	BD+21 2156

Tycho2

Tycho2	1425-01393-1	Pflag		RAmdeg	152.33173808	DEmdeg	20.33235989
PmRA	-21.9	PmDE	-14.4	E RAmdeg	4	E DEmdeg	5
E pmRA	1.0	E pmDE	0.9	EpRAm	1991.44	EpDEm	1991.18
Num	15	Q RAmdeg	1.2	Q DEmdeg	1.2	Q pmRA	1.2
Q pmDE	1.2	BTmag	7.348	E BTmag	0.015	VTmag	6.765
E VTmag	0.010	Prox	999	TYC	T	HIP	49747
CCDM		RAdeg	152.33179194	DEdeg	20.33239333	EpRA 1990	1.72
EpDE 1990	1.65	E RAdeg	4.0	E DEdeg	4.7	Posflg
Corr	0.2

SAO

SAO	81208	DelFlag		RA1950		PmRA1950	-0.0016
DE1950		PmDE1950	-0.027	Vmag	6.6	SpType	+++
Double code		Source	70	CatNum	13941	DM	BD+21 2156
DMcomp		BDsup		HD	88021	M HD	9
GC	13941	RA1950rad	2.64666425	DE1950rad	0.35915706	PmRA2000	-0.0017
PmDE2000	-0.022

Hipparcos

Catalog	H	HIP	49747	Proxy		RAhms	10 09 19.63
DEdms	+20 19 56.6	Vmag	6.68	VarFlag		R Vmag	G
RAdeg	152.332	DEdeg	20.3324	AstroRef		Plx	2.15
CCDM	10093+2020	N CCDM	I	Nsys	1	Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	88021	BD	BD+21 2156
CD		CP		Dm number	+21 2156	VIred	0.63
SpType	F5	R SpType		Coord arcsec 2000	100919.63+201956.6

Hipparcos 2

HIP	49747	Sn	5	So	0	Nc	1
RArad	2.6586914078	DErad	0.3548672201	Plx	3.44	PmRA	-23.39
PmDE	-17.91	E RArad	0.47	E DErad	0.29	E Plx	0.54
E pmRA	0.59	E pmDE	0.28	Hpmag	6.8007	E Hpmag	0.0011
SHp	0.007	VA	0	BV	0.553	E BV	0.001
VI	0.63

CCDM

Ccdm	10093+2020	RComp		Comp	A	Note1
Note2		Discov num		DRAs	1.63	DDEs	-4.0
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	7.4	Sp	F5	PmNote	*
PmRA	-18	PmDE	-26	Dm number	+21 2156	Cat1	BD
Name2	+20 1155	Cat2	AGK2/3	HD	88021	M HD
ADS BDS	A 7662	M ADS BDS		N IDS		IDS	10038N2049A
HIC	49747

10093+2020 B

Componente originario normalizzato	AB		Coord arcsec 2000	100919.62+201956.4		Mag	7.5		Spectral class	A2 (white)
Calc delta mag	0.2		Calc coord	yes

CCDM

Ccdm	10093+2020	RComp		Comp	B	Note1	*
Note2		Discov num	A 2145	DRAs		DDEs
R dRAs		Year	1910	Theta		Rho
Obs	22	Vmag	7.4	Sp	A2	PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD	88022	M HD
ADS BDS	A 7662	M ADS BDS	N	N IDS		IDS	10038N2049B
HIC	49747