12520-2648 B 234

12^h 51^m 55.76^s -26° 47' 23.2" P.A. 296.00 sep 0.6 mag 10.29,10.26

Coord 2000	12520-2648	Discov num	B 234	Comp		Coord arcsec 2000	12 51 55.76 -26 47 23.2
Date first	1926	Date last	2017	Obs	14
Pa first	306	Pa last	296	P.A. Now (θ)	296°
Sep first	0.6	Sep last	0.604	Sep. Now (ρ)	0.604"
Mag pri	10.29	Mag sec	10.26	delta mag (ΔM)	0.03	Spectral class
Pri motion ra	-104	Sec motion ra	-104
Pri motion dec	+032	Sec motion dec	+032
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Hydra

Tycho2

6705-00547-1

ADS

8689

ORBITAL ELEMENTS

Period (P)	122y	Periastron (T)	1972y	Semi-major axis (a)	0.357a
Eccentricity (e)	0.88	Inclination (i)	43°	Longitude of periastron (ω)	335°
Node (Ω)	139.7°	Notes		Reference	Hei1986a
Equinox		Last observation	1984	Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	288.0	0.479
2001	288.5	0.489
2002	289.1	0.498
2003	289.6	0.507
2004	290.1	0.515
2005	290.6	0.523
2006	291.0	0.531
2007	291.5	0.538
2008	291.9	0.546
2009	292.4	0.552
2010	292.8	0.559
2011	293.2	0.566
2012	293.6	0.572
2013	294.0	0.578
2014	294.4	0.583
2015	294.8	0.588
2016	295.2	0.594
2017	295.5	0.598
2018	295.9	0.603
2019	296.2	0.607
2020	296.6	0.611
2021	296.9	0.615
2022	297.3	0.619
2023	297.6	0.622
2024	298.0	0.625
2025	298.3	0.628
2026	298.6	0.631
2027	298.9	0.633
2028	299.3	0.635
2029	299.6	0.637
2030	299.9	0.639

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

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

WDS 12520-2648 B 234 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Hei1986a	orb -	Heintz, W.D.	1986A&AS...64....1H
Hei1986a		A&AS 64, 1, 1986

DISCOVERER

idgroup	discov	author
1	B	van den Bos, W.H.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
12520-2648	B 234		1991	13	281	0.4	10.29	10.26		NO	125155.76-264723.2
12520-2648	B 234		2017	14	296	0.6	10.29	10.26		O	125155.76-264723.2

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

WDS 12520-2648 B 234 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 12520-2648 B 234 : MEASURES

No records found.

WDS 12520-2648 : VIRTUAL EYEPIECE

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WDS 12520-2648 : ALADIN DSS IMAGE @ 12^h 51^m 55.76^s -26° 47' 23.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 12520-2648 B 234 : 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		12520-2648	B 234		296	0.6
Show		12504-2639	TDS8547		300	0.5	22
Show		12527-2619	LDS4288		185	26.5	31
Show		12494-2639	LDS4277		80	84.3	35
Show		12537-2724	TOK 153		147	14.8	44
Show		12549-2705	UC 2431		193	14.5	45
Show		12565-2635	UC 2437	AB	46	13.8	63
Show		12565-2635	YSC 216	Aa,Ab	51	0.1	63
Show		12567-2638	UC 2438		238	20.3	65
Show		12567-2709	KPP 281		146	3.7	68
Show		12543-2758	HJ 4556		80	5.9	77
Show		12483-2748	UC 2407		131	11.3	78
Show		12543-2532	DON 562		237	1.7	82
Show		12476-2747	LDS4269		101	28.4	83
Show		12487-2534	DON 558		279	4.9	85
Show		12457-2633	UC 2400	AB	14	7.9	86
Show		12493-2527	DON 560		267	2.5	88
Show		12527-2519	TDS8568		330	0.8	89
Show		12581-2728	TDS8615		219	0.7	93
Show		12586-2712	KPP2146		225	17.6	93
Show		12497-2515	B 233		285	2.3	98
Show		12527-2825	UC 2419		170	12.5	98
Show		12453-2601	UC 2397		104	47.0	100
Show		12444-2701	KPP2727		180	8.6	102
Show		12541-2509	KPP 280		306	4.8	103
Show		12444-2604	HU 1497		326	1.6	111
Show		12591-2742	RSS 297		86	10.6	111
Show		12440-2727	TDS 673	AB	263	1.7	114
Show		12440-2727	UC 2393	AC	330	40.6	114
Show		13003-2708	I 912		114	2.8	115
Show		13003-2732	KPP2464	BC	57	21.9	121
Show		12432-2722	B 2300		315	10.6	122
Show		12571-2828	LDS5763		151	161.8	123
Show		12508-2851	UC 2415		319	23.0	125
Show		12520-2442	B 235		63	2.7	125
Show		12482-2448	HJ 4551		305	12.0	130
Show		13014-2722	TOK 154		127	19.9	132
Show		12449-2824	SKF1946		256	14.7	135
Show		12417-2657	LDS4250		325	21.9	137
Show		12417-2708	RST1684		209	0.4	139
Show		13028-2631	B 2742		338	12.5	147
Show		13018-2753	UC 2454		189	28.7	147
Show		12434-2514	I 908	AB	154	3.5	148
Show		12434-2514	I 908	AC	21	39.8	148
Show		12434-2514	B 2739	CD	295	7.7	148
Show		12485-2426	ARA2183		222	8.0	150
Show		12407-2650	B 2297		94	9.8	150
Show		12406-2641	TVB 255		259	12.9	152
Show		12429-2514	UC 2389		50	17.6	153
Show		12427-2518	KPP 921		1	7.6	154
Show		12413-2552	UC 2385		19	49.4	154

WDS 12520-2648 : COMPONENTS

	A
B	pa=298.7° sep=0.55"

12520-2648 A

Componente originario normalizzato	AB		Coord arcsec 2000	125155.76-264723.2		Mag	10.29		PmRA	-104.00
PmDE	32.0

12520-2648 B

Componente originario normalizzato	AB		Coord arcsec 2000	125155.72-264722.9		Mag	10.26		PmRA	-104.00
PmDE	32.0		Tycho2	6705-00547-1		Calc delta mag	0.03		Calc coord	yes

Tycho2

Tycho2	6705-00547-1	Pflag		RAmdeg	192.98226776	DEmdeg	-26.78976588
PmRA	-103.8	PmDE	31.7	E RAmdeg	14	E DEmdeg	19
E pmRA	2.0	E pmDE	1.7	EpRAm	1990.43	EpDEm	1986.98
Num	4	Q RAmdeg	1.1	Q DEmdeg	0.7	Q pmRA	1.2
Q pmDE	0.6	BTmag	10.617	E BTmag	0.040	VTmag	9.587
E VTmag	0.023	Prox	999	TYC	T	HIP
CCDM		RAdeg	192.98253194	DEdeg	-26.78983917	EpRA 1990	1.82
EpDE 1990	1.58	E RAdeg	14.4	E DEdeg	20.5	Posflg
Corr	0.0