00360+2959 STF  42AB

 
 
00h 36m 02.39s +29 59' 34.2" P.A. 20.00 sep 6.3 mag 8.39,9.05 Sp G2V+G7V dist. 57.77 pc (188.45 l.y.)
 
 
Coord 2000
00360+2959
Discov num
STF  42
Comp
AB
Coord arcsec 2000
00 36 02.39 +29 59 34.2
Date first
1824
Date last
2020
Obs
151
Pa first
34
Pa last
21
P.A. Now (θ)
20°
Sep first
6.6
Sep last
6.0
Sep. Now (ρ)
6.33"
Mag pri
8.39
Mag sec
9.05
delta mag (ΔM)
0.66
Spectral class
G2V+G7V (yellow/yellow)
Pri motion ra
+186
Sec motion ra
+181
Pri motion dec
-408
Sec motion dec
-399
Notes
N O (See Notes, Orbital solution)
rPM=0.023 (< 0.3, Physical double)
This double is physical.
 
 
00360+2959 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 74132 00 36 02 +29 59 34 STF 42 AB 2020 151 20 6.3 8.39 9.05 0.66 Y <===
Show 74132 00 36 02 +29 59 34 STF 42 AC 2016 37 290 36.7 8.39 11.55 3.16
Show 74132 00 36 03 +29 59 41 STF 42 BC 2016 12 280 37.6 9.05 11.55 2.50
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
20.8
Precise sep
6.037
Constellation
Hydra
SAO
74132
HIP
2844
Tycho2
1744-00173-1
Gaia DR2
2858460959243777408
HD
3266
ADS
497
BD
BD+29 105
Distance
57.77
Distance ly
188.45
last precise pa
20.8
last precise sep
6.037
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)1900y± 190 Periastron (T)1384y± 32 Semi-major axis (a)4.5a± 0.3
Eccentricity (e)0.53± 0.07 Inclination (i)155°± 9 Longitude of periastron (ω)206°± 8
Node (Ω)23°± 2 Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2000
label rho theta
2000 6.253 21.6
2001 6.256 21.5
2002 6.260 21.4
2003 6.264 21.4
2004 6.268 21.3
2005 6.271 21.2
2006 6.275 21.1
2007 6.279 21.1
2008 6.283 21.0
2009 6.286 20.9
2010 6.290 20.8
2011 6.294 20.8
2012 6.297 20.7
2013 6.301 20.6
2014 6.304 20.5
2015 6.308 20.5
2016 6.312 20.4
2017 6.315 20.3
2018 6.319 20.2
2019 6.322 20.2
2020 6.326 20.1
2021 6.329 20.0
2022 6.333 20.0
2023 6.336 19.9
2024 6.340 19.8
2025 6.343 19.7
2026 6.347 19.7
2027 6.350 19.6
2028 6.353 19.5
2029 6.357 19.4
2030 6.360 19.4


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



 
 


wds00360%2B2959a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)4282.1595y± 2333.3661 Periastron (T)1514.2196y± 760.9782 Semi-major axis (a)12.58885a± 6.47845
Eccentricity (e)0.87571± 0.15322 Inclination (i)114.334°± 15.816 Longitude of periastron (ω)282.011°± 19.883
Node (Ω)76.522°± 96.681 Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 6.207 22.0
2001 6.211 22.0
2002 6.214 21.9
2003 6.218 21.8
2004 6.222 21.7
2005 6.225 21.7
2006 6.229 21.6
2007 6.233 21.5
2008 6.236 21.5
2009 6.240 21.4
2010 6.244 21.3
2011 6.247 21.3
2012 6.251 21.2
2013 6.254 21.1
2014 6.258 21.1
2015 6.262 21.0
2016 6.265 20.9
2017 6.269 20.9
2018 6.273 20.8
2019 6.276 20.7
2020 6.280 20.7
2021 6.283 20.6
2022 6.287 20.5
2023 6.291 20.5
2024 6.294 20.4
2025 6.298 20.3
2026 6.301 20.3
2027 6.305 20.2
2028 6.308 20.1
2029 6.312 20.1
2030 6.316 20.0


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



 
 


wds00360%2B2959b.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
00360+2959 STF 42 AB 2007 100 21 6.2 8.39 9.05 G2V NODV 003602.24+295938.4
00360+2959 STF 42 AB 2009 101 21 6.2 8.39 9.05 G2V NODV 003602.24+295938.4
00360+2959 STF 42 AB 2010 109 21 6.0 8.39 9.05 G2V NOD 003602.24+295938.4
00360+2959 STF 42 AB 2012 111 21 6.3 8.39 9.05 G2V NOD 003602.24+295938.4
00360+2959 STF 42 AB 2013 129 21 6.1 8.39 9.05 G2V NOD 003602.24+295938.4
00360+2959 STF 42 AB 2015 134 20 6.3 8.39 9.05 G2V+G7V NO 003602.24+295938.4
00360+2959 STF 42 AB 2016 141 21 6.3 8.39 9.05 G2V+G7V NO 003602.39+295934.2
00360+2959 STF 42 AB 2018 144 21 6.3 8.39 9.05 G2V+G7V NO 003602.39+295934.2
00360+2959 STF 42 AB 2020 145 21 6.4 8.39 9.05 G2V+G7V NO 003602.39+295934.2

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

 
 
WDS 00360+2959 STF 42AB : NOTES
 
 
discov_num notes refcode
STF 42 Hyperbolic orbit by Hopmann. Hop1967
sigma = areal constant in the true orbit = 0.1432 arcsec^2/yr
q = periastron distance in the true orbit = 6".123
Hopmann made small but unspecified corrections to the node and
inclination before computing residuals and ephemeris. Fin1970b
All hyperbolic orbits rejected from Fourth Orbit Catalog Wor1983
A is a spectroscopic binary.
AC: Optical pair, based on study of relative motion of the components
using the method of apparent motion parameters. Kiy2008
 
 
REFERENCES
 
 
refcode metd author reference
Fin1970b - Finsen, W.S. & Worley, C.E. 1970ROCi..130..203F
Fin1970b Republic Obs. Circ. 130, 203, 1970 (Third Orbit Catalog)
Hop1967 orb - Hopmann, J. 1967MiWie..13...49H
Hop1967 Mitt. Sternw. Wien 13, 49, 1967
Izm2019 orb u Izmailov, I.S. 2016AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019
Izm2019
Kis2009 orb - Kiselev, A.A., Romanenko, J.G., & Kalinichenko, O.A. 2009ARep...53..126K
Kis2009 ARep 53, 126, 2009 (SvAL 86, 148, 2009)
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
Wor1983 - Worley, C.E. & Heintz, W.D. 1983PUSNO..24g...1W
Wor1983 Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)
 
 
DISCOVERER
 
 
discov author
STF Struve, F.G.W.

 
 
WDS 00360+2959 STF 42AB : VISUAL OBSERVATIONS REPORTS
 
 
Show date username difficulty separation pa_estim interest notes
Show 21/11/09 daedalus1 mean difficulty separated     Seeing Pickering 6, measures: theta 019 deg., rho 6".12

 
 
WDS 00360+2959 STF 42AB : MEASURES
 
 
No records found.

 
 
WDS 00360+2959 STF 42AB : Virtual Eyepiece
 
 

00360+2959 STF  42A mag 8.39 Sp G2V 00360+2959 STF  42B sep 6.8 P.A. 15.60 mag 9.05 Sp G7V 00360+2959 STF  42C sep 32.4 P.A. 292.30 mag 11.55 virtual eyepiece
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WDS 00360+2959 STF 42AB : Aladin DSS image @ 00h 36m 02.39s +29 59' 34.2"