03344+2428 STF 412AB (7 Tau)

 
 
03h 34m 26.62s +24 27' 52.1" P.A. 350.4 sep 0.76 mag 6.60,6.86 Sp A3V+A3V dist. 131.58 pc (429.21 l.y.)
 
 
Coord 2000
03344+2428
Discov num
STF 412
Comp
AB
Coord arcsec 2000
03 34 26.62 +24 27 52.1
Date first
1828
Date last
2018
Obs
307
Pa first
272
Pa last
349
P.A. Now (θ)
350.4°
Sep first
0.6
Sep last
0.8
Sep. Now (ρ)
0.76"
Mag pri
6.60
Mag sec
6.86
delta mag (ΔM)
0.26
Spectral class
A3V+A3V (white/white)
Pri motion ra
+006
Sec motion ra
+006
Pri motion dec
-026
Sec motion dec
-026
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
03344+2428 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 7 Tau 75999 03344+2428 STF 412 AB 1828 2018 307 350 0.8 6.60 6.86 0.26 Y <===
Show 03344+2428 STF 412 AB,C 1782 2014 85 53 22.4 5.94 9.92 3.98
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
349.2
Precise sep
0.763
Name
7 Tau
Constellation
Taurus
SAO
75999
HIP
16664
Tycho2
1802-01524-1
Gaia DR2
567412992
HD
22091
HR
1086
GC
4257
ADS
2616
BD
BD+23 473
Flamsteed
7 Tauri
Flamsteed name
7 Tau
Distance
131.58
Distance ly
429.21
last precise pa
349.2
last precise sep
0.763
 
 
ORBITAL ELEMENTS
 
 
Period (P)522.16y Periastron (T)1911.62y Semi-major axis (a)0.625a
Eccentricity (e)0.679 Inclination (i)157.2° Longitude of periastron (ω)238.1°
Node (Ω)13° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2000
label rho theta
2000 0.689 356.9
2001 0.693 356.5
2002 0.698 356.2
2003 0.702 355.8
2004 0.706 355.4
2005 0.710 355.1
2006 0.714 354.7
2007 0.718 354.3
2008 0.722 354.0
2009 0.726 353.6
2010 0.730 353.3
2011 0.734 353.0
2012 0.738 352.6
2013 0.742 352.3
2014 0.745 352.0
2015 0.749 351.6
2016 0.753 351.3
2017 0.756 351.0
2018 0.760 350.7
2019 0.764 350.4
2020 0.767 350.1
2021 0.771 349.7
2022 0.774 349.4
2023 0.778 349.1
2024 0.781 348.8
2025 0.784 348.5
2026 0.788 348.2
2027 0.791 348.0
2028 0.794 347.7
2029 0.797 347.4
2030 0.801 347.1

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






wds03344%2B2428a.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
03344+2428 STF 412 AB 2006 286 355 0.7 6.60 6.86 A2V NOD 033426.62+242752.1
03344+2428 STF 412 AB 2008 292 355 0.7 6.60 6.86 A2V NOD 033426.62+242752.1
03344+2428 STF 412 AB 2009 293 354 0.7 6.60 6.86 A2V NOD 033426.62+242752.1
03344+2428 STF 412 AB 2010 297 354 0.7 6.60 6.86 A2V NOD 033426.62+242752.1
03344+2428 STF 412 AB 2012 298 353 0.7 6.60 6.86 A2V NOD 033426.62+242752.1
03344+2428 STF 412 AB 2014 292 353 0.8 6.60 6.86 A3V+A3V NOD 033426.62+242752.1
03344+2428 STF 412 AB 2015 297 352 0.8 6.60 6.86 A3V+A3V NO 033426.62+242752.1
03344+2428 STF 412 AB 2016 301 352 0.8 6.60 6.86 A3V+A3V NO 033426.62+242752.1
03344+2428 STF 412 AB 2017 302 354 0.8 6.60 6.86 A3V+A3V NO 033426.62+242752.1
03344+2428 STF 412 AB 2018 303 349 0.8 6.60 6.86 A3V+A3V NO 033426.62+242752.1

If you need more information about this double, apply for a data request form to the WDS.
 
 
WDS 03344+2428 STF 412AB - 7 TAU : NOTES
 
 
discov_num notes refcode
STF 412 7 Tau. Only P, T, and a were redetermined by Vlaicu & Vasile (1961); Vla1965
the remaining elements were from the orbit of Luyten (1934). Luy1934c
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 2.04 +/- 1.54, 4.91, and 2.09 Msun, respectively. Mlk2012
AB,C: H 4 88. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
Luy1934c orb - Luyten, W.J. .
Luy1934c Pub. Univ. Minnesota Obs. 2, 23, 1934
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sca2002a orb - Scardia, M., Prieur, J.-L., Koechlin, L., & Aristidi, E. 2002IAUDS.146....1S
Sca2002a Inf. Circ. 146, 1, 2002
Vla1965 orb - Vlaicu, S. & Vasile, M. .
Vla1965 Studii Cerc. Astr. Seism. 10, 243, 1965
 
 
DISCOVERER
 
 
discov author
STF (F. Struve DD - Appendix list #1)
STF (F. Struve DD - Appendix list #2)
STF Struve, F.G.W.

 
 
WDS 03344+2428 STF 412AB - 7 TAU : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 03344+2428 STF 412AB - 7 TAU : MEASURES
 
 
No records found.

 
 
WDS 03344+2428 STF 412AB - 7 Tau : Virtual Eyepiece
 
 

03344+2428  STF 412 A 03344+2428  STF 412AB sep 0.76 P.A. 350.4 mag 6.60,6.86 Sp A3V+A3V 03344+2428  STF 412AB,C sep 22.4 P.A. 53 mag 5.94,9.92 Sp A3V+A3V virtual eyepiece
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Radius:
 
 
WDS 03344+2428 STF 412AB - 7 Tau : Aladin DSS image @ 03h 34m 26.62s +24 27' 52.1"