11297-0619 A 7 (HD 99917)

 
 
11h 29m 43.17s -06° 18' 31.3" P.A. 134.00 sep 0.2 mag 9.70,9.70 Sp F8
 
 
Coord 2000 11297-0619 Discov num A     7 Comp Coord arcsec 2000 11 29 43.17 -06 18 31.3
Date first 1899 Date last 2018 Obs 20
Pa first 264 Pa last 134.1 P.A. Now (θ) 134.1°
Sep first 0.5 Sep last 0.165 Sep. Now (ρ) 0.165"
Mag pri 9.70 Mag sec 9.70 delta mag (ΔM) 0 Spectral class F8 (yellow-white)
Pri motion ra -014 Sec motion ra
Pri motion dec -012 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 99917 Constellation Leo SAO 138235 Tycho2 4929-01083-1
Gaia DR2 3785426983187269632 HD 99917 ADS 8182
 
 
ORBITAL ELEMENTS
 
 
Period (P)204.32y± 11.2 Periastron (T)2050.54y± 19.37 Semi-major axis (a)0.447a± 0.077
Eccentricity (e)0.656± 0.017 Inclination (i)105.1°± 5.8 Longitude of periastron (ω)59.8°± 13.4
Node (Ω)93.3°± 4.9 Notes ReferenceTok2015c
Equinox2000 Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 188.6 0.157
2001 185.8 0.155
2002 182.8 0.153
2003 179.9 0.152
2004 176.8 0.151
2005 173.8 0.150
2006 170.7 0.150
2007 167.6 0.150
2008 164.5 0.150
2009 161.5 0.151
2010 158.5 0.152
2011 155.5 0.154
2012 152.6 0.156
2013 149.8 0.158
2014 147.0 0.160
2015 144.4 0.163
2016 141.8 0.165
2017 139.3 0.168
2018 136.9 0.172
2019 134.6 0.175
2020 132.4 0.179
2021 130.3 0.182
2022 128.2 0.186
2023 126.3 0.190
2024 124.4 0.193
2025 122.6 0.197
2026 120.8 0.201
2027 119.1 0.204
2028 117.5 0.207
2029 115.9 0.211
2030 114.4 0.214


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



 
 


wds11297-0619a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS 11297-0619 A 7 (HD 99917) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
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
11297-0619 A 7 1995 18 202 0.2 9.70 9.70 F8 O 112943.17-061831.3
11297-0619 A 7 2014 19 146 0.2 9.70 9.70 F8 O 112943.17-061831.3
11297-0619 A 7 2018 20 134 0.2 9.70 9.70 F8 O 112943.17-061831.3

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WDS 11297-0619 A 7 (HD 99917) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 11297-0619 A 7 (HD 99917) : MEASURES
 
 
No records found.

 
 
WDS 11297-0619 (HD 99917) : VIRTUAL EYEPIECE
 
 

virtual eyepiece
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Radius:
Components only
 
 
WDS 11297-0619 (HD 99917) : ALADIN DSS IMAGE @
 
 
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.