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21241 (1995 WN33)
Classification: Main-belt Asteroid          SPK-ID: 2021241
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1223751726191878 2.8757e-08  
a 2.597818405476672 9.8283e-09 au
q 2.279909929673161 7.7316e-08 au
i 12.56568966310127 5.4371e-06 deg
node 207.8022891357924 1.4472e-05 deg
peri 270.2663729082294 2.7213e-05 deg
M 291.0232615049916 2.3434e-05 deg
tp 2459493.529784394374
(2021-Oct-06.02978439)
9.9859e-05 TDB
period 1529.366634080685
4.19
8.6791e-06
2.376e-08
d
yr
n .2353915614331412 1.3358e-09 deg/d
Q 2.915726881280182 1.1031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1592  
   data-arc span      10660 days (29.19 yr)  
   first obs. used      1991-11-06  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49802  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:33  

Additional Information
 Earth MOID = 1.33675 au 
 Jupiter MOID = 2.27511 au 
 T_jup = 3.372 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.28   n/a E2021B10  
diameter diameter 3.966 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.214   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21241 (1995 WN33)          Discovered 1995-Nov-20 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WN33 = 1991 VZ12 = 1993 HU6 = 2007 RD276 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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