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9991 Anezka (1997 TY7)
Classification: Main-belt Asteroid          SPK-ID: 2009991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1577107994867548 3.1641e-08  
a 3.199142569238626 1.7815e-08 au
q 2.694603236971892 9.9131e-08 au
i 2.177496849410895 3.2021e-06 deg
node 80.59765535449307 9.3399e-05 deg
peri 114.9021140127826 9.396e-05 deg
M 168.9904898010475 1.1834e-05 deg
tp 2458019.410601143253
(2017-Sep-22.91060114)
6.5254e-05 TDB
period 2090.012189468425
5.72
1.7458e-05
4.78e-08
d
yr
n .1722477992300909 1.4388e-09 deg/d
Q 3.703681901505361 2.0625e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2093  
   data-arc span      15956 days (43.69 yr)  
   first obs. used      1977-02-19  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51095  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:09:28  

Additional Information
 Earth MOID = 1.69434 au 
 Jupiter MOID = 1.25227 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457153.5 (2015-May-11.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1568384925787353 3.183e-08  
q 2.699027573586753 9.9768e-08 au
tp 2458023.320142133723
(2017-Sep-26.82014213)
6.5387e-05 TDB
node 80.61748585106952 9.3465e-05 deg
peri 115.6900932886052 9.4025e-05 deg
i 2.177242665910577 3.199e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2093  
   data-arc span      15956 days (43.69 yr)  
   first obs. used      1977-02-19  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51095  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:09:28  

Additional Information
 Jupiter MOID = 1.25227 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.013170839692311E-15 -3.140783036398045E-15 2.042702275264402E-14 2.470397232436774E-15 1.345085255836201E-15 1.631799947141341E-16
q -3.140783036398045E-15 9.953635611701723E-15 2.76013476165422E-13 -8.295195896990785E-15 3.413959873436639E-14 -4.169609391112347E-16
tp 2.042702275264402E-14 2.76013476165422E-13 4.275442442575914E-9 -4.347613858724848E-12 6.879504865976747E-10 3.899127392929175E-13
node 2.470397232436774E-15 -8.295195896990785E-15 -4.347613858724848E-12 8.735689170690018E-9 -8.729905465097793E-9 -2.349322154250573E-11
peri 1.345085255836201E-15 3.413959873436639E-14 6.879504865976747E-10 -8.729905465097793E-9 8.840648035728222E-9 2.353356111056904E-11
i 1.631799947141341E-16 -4.169609391112347E-16 3.899127392929175E-13 -2.349322154250573E-11 2.353356111056904E-11 1.023365333992293E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3   n/a MPO358727  
diameter diameter 12.293 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.469 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.097   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9991 Anezka (1997 TY7)          Discovered 1997-Oct-05 by Klet at Klet
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 TY7 = 1977 DX9 = 1983 GV1 = 1994 BZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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