12199-0040 MCA  37 (Zaniah)

 
 
12h 19m 54.39s -00 40' 00.3" P.A. 322.40 sep 0.1 mag 3.89,5.90 Sp A2IV dist. 81.37 pc (265.43 l.y.)
 
 
Coord 2000
12199-0040
Discov num
MCA  37
Comp
Coord arcsec 2000
12 19 54.39 -00 40 00.3
Date first
1976
Date last
2020
Obs
93
Pa first
152
Pa last
297
P.A. Now (θ)
322.4°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.12"
Mag pri
3.89
Mag sec
5.90
delta mag (ΔM)
2.01
Spectral class
A2IV (white)
Pri motion ra
-063
Sec motion ra
Pri motion dec
-018
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
296.6
Precise sep
0.096
Common name
Zaniah
Meaning
angle
Constellation
Virgo
SAO
138721
HIP
60129
HD
107259
HR
4689
GC
16813
Bayer
Eta Virginis
Bayer name
Eta Vir
Flamsteed
15 Virginis
Flamsteed name
15 Vir
Distance
81.37
Distance ly
265.43
last precise pa
296.6
last precise sep
0.096
 
 
ORBITAL ELEMENTS
 
 
Period (P)13.1y Periastron (T)1990.2y Semi-major axis (a)0.135a
Eccentricity (e)0.08 Inclination (i)50° Longitude of periastron (ω)
Node (Ω)173° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.088 74.0
2001 0.092 115.5
2002 0.112 146.7
2003 0.124 169.3
2004 0.117 190.8
2005 0.097 218.7
2006 0.086 258.7
2007 0.099 298.3
2008 0.124 324.5
2009 0.142 342.5
2010 0.145 357.9
2011 0.133 14.3
2012 0.109 36.2
2013 0.089 69.9
2014 0.091 111.7
2015 0.110 144.1
2016 0.124 167.2
2017 0.119 188.5
2018 0.100 215.4
2019 0.086 254.3
2020 0.097 294.9
2021 0.121 322.4
2022 0.141 340.9
2023 0.145 356.3
2024 0.134 12.5
2025 0.112 33.6
2026 0.090 65.9
2027 0.089 107.7
2028 0.108 141.4
2029 0.123 165.1
2030 0.120 186.3


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



 
 


wds12199-0040a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
12199-0040 MCA 37 2008 81 333 0.1 3.89 5.90 A2IV NOD 121954.39-004000.3
12199-0040 MCA 37 2017 88 195 0.1 3.89 5.90 A2IV NO 121954.39-004000.3
12199-0040 MCA 37 2018 90 253 0.1 3.89 5.90 A2IV NO 121954.39-004000.3
12199-0040 MCA 37 2019 92 272 0.1 3.89 5.90 A2IV NO 121954.39-004000.3

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

 
 
WDS 12199-0040 MCA 37 - ZANIAH : NOTES
 
 
discov_num notes refcode
MCA 37 eta Vir = 15 Vir = Zaniah. A spectroscopic and occultation binary now
resolved by speckle interferometry.
Observed parallax corroborates closely the orbital value given by
Hartkopf et al. (1992). Primary is 72d SB2 (#718 in Batten et al., Hrt1992a
1989). This is not the SB2 because the observed angular separations Bte1989
are much larger than the 12 mas maximum predicted by Halbwachs (1981) HJL1981
from the spectroscopic elements. See discussion in Balega et al. Bag1984b
(1984), who give preliminary orbital elements based entirely on
speckle observations.
1985.2053, 1985.2491: These measures agree well with the preliminary
orbit of Balega et al. (1984), who adopted a period of 13 years. The
orbit proposed by Tokovinin (1984) with P = 9.8 years fails to fit the Tok1984
speckle observations. Bnu1986
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
A new speckle/spectroscopic orbit of the early A type triple system
eta Vir has been determined by Hartkopf et al. (1992). Hrt1992a
Martin et al. (1998) derive component masses 6.009 +/- 2.164 and
0.673 +/- 0.800 Msun. Mig1998
 
 
REFERENCES
 
 
refcode metd author reference
Bag1984b S j Balega, Y.Y., Bonneau, D., & Foy, R 1984A&AS...57...31B
Bag1984b A&AS 57, 31, 1984
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
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
Bte1989 - Batten, A.H. & Fletcher, J.M. 1989PDAO...17....1B
Bte1989 Eighth Catalogue of the Orbital Elements of Spectroscopic Binary Systems; 89
Bte1989 Pub. DAO 17, 1, 19
HJL1981 - Halbwachs, J.L. 1981A&AS...44...47H
HJL1981 A&AS 44, 47, 1981
Hrt1992a orb - Hartkopf, W.I., McAlister, H.A., Yang, X., & Fekel, F.C. 1992AJ....103.1976H
Hrt1992a AJ 103, 1976, 1992
Mig1998 orb - Martin, Ch., Mignard, F., Hartkopf, W.I., & McAlister, H.A. 1998A&AS..133..149M
Mig1998 A&AS 133, 149, 1998
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
Tok1984 orb - Tokovinin, A.A. 1984SvAL...10..121T
Tok1984 SvAL 10, 121, 1984
 
 
DISCOVERER
 
 
discov author
MCA McAlister, H.A., Hendry, E.M., Hartkopf, W.I., Campbell, B.G., & Fekel, F.C.
MCA Lu, P.K., Demarque, P., van Altena, W., McAlister, H.A., & Hartkopf, W.I.
MCA McAlister, H.A., Mason, B.D., Hartkopf, W.I., & Shara, M.M.
MCA McAlister, H.A.
MCA McAlister, H.A. & DeGioia, K.A.
MCA McAlister, H.A. & Hartkopf, W.I.
MCA McAlister, H.A., Hartkopf, W., Hutter, D., Shara, M., & Franz, O.
MCA McAlister, H.A., Hartkopf, & Franz, O.G.
MCA McAlister, H.A., Mason, B.D., Hartkopf, W.I., Roberts, L.C., Jr., & Shara, M.M.
MCA McAlister, H.A. & Fekel, F.C.
MCA McAlister, H.A., Hartkopf, W.I., Hendry, E.M., Gaston, B.J., & Fekel, F.C.
MCA McAlister, H.A., Hartkopf, W.I., Bagnuolo, W.G., Sowell, J.R., Franz, O.G., &
MCA McAlister, H.A. & Hendry, E.M.
MCA McAlister, H.A., Hartkopf, W.I., Hutter, D.J., & Franz, O.G.
MCA McAlister, H.A., Hartkopf, W.I., & Mason, B.D.
MCA Fu, H.-H., Hartkopf, W.I., Mason, B.D., McAlister, H.A., Dombrowski, E.G., &
MCA McAlister, H.A., Hartkopf, W.I., Sowell, J.R., Dombrowski, E.G., & Franz, O.G.
MCA Al-Shukri, A.M., McAlister, H.A., Hartkopf, W.I., Mason, B.D., & Franz, O.G.

 
 
WDS 12199-0040 MCA 37 - ZANIAH : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 12199-0040 MCA 37 - ZANIAH : MEASURES
 
 
No records found.

 
 
WDS 12199-0040 MCA 37 - Zaniah : Virtual Eyepiece
 
 

12199-0040 MCA  37A mag 3.89 Sp A2IV 12199-0040 MCA  37B sep 0.1 P.A. 296.60 mag 5.9 virtual eyepiece
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WDS 12199-0040 MCA 37 - Zaniah : Aladin DSS image @ 12h 19m 54.39s -00 40' 00.3"