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JPL Small-Body Database Browser
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11312 (1994 AR2)
Classification: Main-belt Asteroid          SPK-ID: 2011312
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1765037215868387 2.5907e-08  
a 2.365790610296966 6.3533e-09 au
q 1.948219763084353 6.2292e-08 au
i .944046314799211 2.9475e-06 deg
node 57.42721806371861 0.00019994 deg
peri 199.9233273331782 0.00020015 deg
M 325.8078681361857 9.7675e-06 deg
tp 2459126.736969886733
(2020-Oct-04.23696989)
3.622e-05 TDB
period 1329.11598903018
3.64
5.354e-06
1.466e-08
d
yr
n .2708567220402504 1.0911e-09 deg/d
Q 2.78336145750958 7.4747e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2149  
   data-arc span      14631 days (40.06 yr)  
   first obs. used      1980-04-08  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51668  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:31:43  

Additional Information
 Earth MOID = .933197 au 
 Jupiter MOID = 2.27157 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456731.5 (2014-Mar-15.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1771454084820711 2.5876e-08  
q 1.946697281212925 6.2264e-08 au
tp 2456467.872159964207
(2013-Jun-24.37215996)
3.4191e-05 TDB
node 57.41560756149617 0.00019987 deg
peri 199.9132800348324 0.00020008 deg
i .9445462011946388 2.9473e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2149  
   data-arc span      14631 days (40.06 yr)  
   first obs. used      1980-04-08  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51668  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:31:43  

Additional Information
 Jupiter MOID = 2.27157 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.695596519710589E-16 -1.605573366208914E-15 -1.008294104799455E-14 -5.944414911637675E-17 5.429945094821251E-15 -3.467705276421454E-17
q -1.605573366208914E-15 3.876834291769733E-15 2.721534102147976E-14 6.117437299269269E-17 -1.047143936259143E-14 9.243819955078219E-17
tp -1.008294104799455E-14 2.721534102147976E-14 1.169054374384532E-9 3.472395500661393E-12 3.201502493615323E-10 3.693094763082935E-14
node -5.944414911637675E-17 6.117437299269269E-17 3.472395500661393E-12 3.994824174890867E-8 -3.994170746023898E-8 -3.790089245433732E-11
peri 5.429945094821251E-15 -1.047143936259143E-14 3.201502493615323E-10 -3.994170746023898E-8 4.003006093947676E-8 3.790479696206265E-11
i -3.467705276421454E-17 9.243819955078219E-17 3.693094763082935E-14 -3.790089245433732E-11 3.790479696206265E-11 8.686741201375452E-12

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 14.3   n/a MPO365386  
diameter diameter 3.628 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.307   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11312 (1994 AR2)          Discovered 1994-Jan-14 by Kobayashi, T. at Oizumi
Reference: 19990831/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 AR2 = 1980 GY1 = 1997 CQ14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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