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21247 (1995 YJ1)
Classification: Main-belt Asteroid          SPK-ID: 2021247
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08521144015931975 3.4214e-08  
a 2.894878483866437 1.2363e-08 au
q 2.64820171916995 9.8863e-08 au
i 2.963635460276297 3.347e-06 deg
node 128.6498602734563 6.8403e-05 deg
peri 236.4880526861729 7.1375e-05 deg
M 118.6572495366447 2.0187e-05 deg
tp 2458607.525918705008
(2019-May-04.02591870)
0.00010098 TDB
period 1799.052903213229
4.93
1.1525e-05
3.155e-08
d
yr
n .2001052883753535 1.2819e-09 deg/d
Q 3.141555248562924 1.3417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2161  
   data-arc span      16039 days (43.91 yr)  
   first obs. used      1977-02-19  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49068  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:35  

Additional Information
 Earth MOID = 1.64582 au 
 Jupiter MOID = 2.28596 au 
 T_jup = 3.282 
[ 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 13.58   n/a E2021B10  
diameter diameter 4.799 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.367   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21247 (1995 YJ1)          Discovered 1995-Dec-21 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 YJ1 = 1977 DV9 = 1994 RJ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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