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9868 (1991 VP1)
Classification: Main-belt Asteroid          SPK-ID: 2009868
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1293257245793015 3.0604e-08  
a 2.254861799275752 6.2383e-09 au
q 1.963250163258228 6.9442e-08 au
i 4.923953941493221 3.4378e-06 deg
node 122.9851936448945 4.5262e-05 deg
peri 317.2547035886128 4.7827e-05 deg
M 125.2668298556964 1.5947e-05 deg
tp 2458570.159810738511
(2019-Mar-27.65981074)
5.4225e-05 TDB
period 1236.739752355849
3.39
5.1324e-06
1.405e-08
d
yr
n .2910879183063703 1.208e-09 deg/d
Q 2.546473435293277 7.0451e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1832  
   data-arc span      11476 days (31.42 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4844  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:02:06  

Additional Information
 Earth MOID = .982383 au 
 Jupiter MOID = 2.65518 au 
 T_jup = 3.608 
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Orbital Elements at Epoch 2456808.5 (2014-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .128641346509299 3.0569e-08  
q 1.965443720892527 6.9348e-08 au
tp 2457333.317118519425
(2015-Nov-06.81711852)
5.3359e-05 TDB
node 123.0275886049142 4.524e-05 deg
peri 317.3149198578625 4.7838e-05 deg
i 4.924329872863913 3.4385e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1832  
   data-arc span      11476 days (31.42 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4844  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:02:06  

Additional Information
 Jupiter MOID = 2.65518 au 
 T_jup = 3.608 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.344846883560564E-16 -2.113384118550054E-15 -1.948355718433406E-13 1.172929273567907E-15 -5.501687655247102E-14 -1.893162680163949E-16
q -2.113384118550054E-15 4.809134767822413E-15 4.974625094288844E-13 -2.074502353330796E-15 1.360034398112237E-13 4.823182125623852E-16
tp -1.948355718433406E-13 4.974625094288844E-13 2.847151051291614E-9 -1.641777063823028E-11 8.441508078860104E-10 4.76374405525807E-13
node 1.172929273567907E-15 -2.074502353330796E-15 -1.641777063823028E-11 2.046635163741661E-9 -2.04333660785929E-9 1.265412307771994E-11
peri -5.501687655247102E-14 1.360034398112237E-13 8.441508078860104E-10 -2.04333660785929E-9 2.28845179339481E-9 -1.246823137202784E-11
i -1.893162680163949E-16 4.823182125623852E-16 4.76374405525807E-13 1.265412307771994E-11 -1.246823137202784E-11 1.182311439079141E-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 14.5   n/a MPO458925  
diameter diameter 3.463 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.234   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9868 (1991 VP1)          Discovered 1991-Nov-04 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19990106/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 VP1 = 1994 PQ27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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