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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1577108010650237 3.1799e-08  
a 3.199142571182177 1.8227e-08 au
q 2.694603233559816 9.9368e-08 au
i 2.177497458511682 3.3753e-06 deg
node 80.597667049652 9.5873e-05 deg
peri 114.902100520267 9.6483e-05 deg
M 168.9904909528397 1.205e-05 deg
tp 2458019.410593562370
(2017-Sep-22.91059356)
6.6949e-05 TDB
period 2090.012191373019
5.72
1.7862e-05
4.89e-08
d
yr
n .1722477990731243 1.4721e-09 deg/d
Q 3.703681908804537 2.1102e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1936  
   data-arc span      15919 days (43.58 yr)  
   first obs. used      1977-02-19  
   last obs. used      2020-09-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 16:20:18  

Additional Information
 Earth MOID = 1.69434 au 
 Jupiter MOID = 1.25227 au 
 T_jup = 3.174 
[ show covariance matrix ]

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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