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99907 (1989 VA)
Classification: Aten [NEO]          SPK-ID: 2099907
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 144 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5947108295367977 1.0142e-07  
a .7283664289108579 3.2697e-09 au
q .2951990257665266 7.4642e-08 au
i 28.79846050077477 1.5008e-05 deg
node 225.5965303855307 5.2811e-06 deg
peri 2.851967018754247 1.3106e-05 deg
M 224.7641407635834 3.5615e-05 deg
tp 2459085.792858903747
(2020-Aug-24.29285890)
2.2638e-05 TDB
period 227.0509418043509
0.62
1.5289e-06
4.186e-09
d
yr
n 1.585547265909211 1.0676e-08 deg/d
Q 1.161533832055189 5.2142e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 1.297403786571674E-14 3.329E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      844  
   data-arc span      11350 days (31.07 yr)  
   first obs. used      1989-11-02  
   last obs. used      2020-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-30 05:18:26  

Additional Information
 Earth MOID = .155208 au 
 Jupiter MOID = 3.8279 au 
 T_jup = 7.671 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 17.9   n/a MPO251027  
diameter diameter 1.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 2.5246 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L.; Mottola, S.; et al. (1997) Icarus 130, 275-286.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

99907 (1989 VA)          Discovered 1989-Nov-02 by Shoemaker, C. S. at Palomar
Reference: 20050622/Numbers.arcLast Updated: 2005-06-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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