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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1293257290858957 3.5166e-08  
a 2.254861798602271 6.8771e-09 au
q 1.963250152510098 8.0936e-08 au
i 4.923951111401865 3.9762e-06 deg
node 122.9851960133832 4.5362e-05 deg
peri 317.2547018280397 4.8267e-05 deg
M 125.2668298894999 1.6195e-05 deg
tp 2458570.159810815183
(2019-Mar-27.65981082)
5.5236e-05 TDB
period 1236.739751801765
3.39
5.6579e-06
1.549e-08
d
yr
n .2910879184367834 1.3317e-09 deg/d
Q 2.546473444694444 7.7664e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1641  
   data-arc span      11348 days (31.07 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50247  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:29:36  

Additional Information
 Earth MOID = .982383 au 
 Jupiter MOID = 2.65518 au 
 T_jup = 3.608 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456478.5 (2013-Jul-05.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1288201429547242 3.5165e-08  
q 1.964639569765496 8.0904e-08 au
tp 2456095.844903331585
(2012-Jun-17.34490333)
5.4701e-05 TDB
node 123.0318688596103 4.5348e-05 deg
peri 317.2401091410057 4.8282e-05 deg
i 4.924171987512014 3.9768e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1641  
   data-arc span      11348 days (31.07 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50247  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:29:36  

Additional Information
 Jupiter MOID = 2.65518 au 
 T_jup = 3.608 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.236592569107082E-15 -2.837608347338429E-15 7.659077393717863E-14 1.271953570451265E-15 4.396161715464559E-14 -9.266926111823538E-16
q -2.837608347338429E-15 6.545422654898182E-15 -1.807579610405403E-13 -2.233806635222027E-15 -1.014287423185965E-13 2.20012007964955E-15
tp 7.659077393717863E-14 -1.807579610405403E-13 2.992204361329505E-9 -1.816022344507838E-11 9.199985354791681E-10 2.237971423454979E-12
node 1.271953570451265E-15 -2.233806635222027E-15 -1.816022344507838E-11 2.056469471992061E-9 -2.053499336566423E-9 1.103045411604794E-11
peri 4.396161715464559E-14 -1.014287423185965E-13 9.199985354791681E-10 -2.053499336566423E-9 2.331185036938871E-9 -1.031149422298018E-11
i -9.266926111823538E-16 2.20012007964955E-15 2.237971423454979E-12 1.103045411604794E-11 -1.031149422298018E-11 1.58147551974435E-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

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