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21322 (1997 AV2)
Classification: Main-belt Asteroid          SPK-ID: 2021322
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2879892152643844 3.6029e-08  
a 2.708467565781144 9.0801e-09 au
q 1.928458116942795 9.784e-08 au
i 2.973188380285694 3.8263e-06 deg
node 68.91005224434372 8.2189e-05 deg
peri 83.15651966340366 8.2534e-05 deg
M 115.5979049192469 7.1608e-06 deg
tp 2458677.705093101830
(2019-Jul-13.20509310)
3.1083e-05 TDB
period 1628.110532062118
4.46
8.1873e-06
2.242e-08
d
yr
n .2211152086486624 1.1119e-09 deg/d
Q 3.488477014619493 1.1695e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1147  
   data-arc span      13255 days (36.29 yr)  
   first obs. used      1984-04-06  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5227  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:43:24  

Additional Information
 Earth MOID = .94172 au 
 Jupiter MOID = 1.51988 au 
 T_jup = 3.301 
[ 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 15.02   n/a E2021B10  
diameter diameter 5.890 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.689 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.036   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21322 (1997 AV2)          Discovered 1997-Jan-03 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 AV2 = 1984 GU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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