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17631 (1996 HV21)
Classification: Main-belt Asteroid          SPK-ID: 2017631
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09895402656871544 3.3687e-08  
a 2.190051830080699 9.3597e-09 au
q 1.97333738310003 7.3694e-08 au
i 4.475694318160491 3.8488e-06 deg
node 37.81280552591192 6.4032e-05 deg
peri 188.2566395147865 7.0068e-05 deg
M 143.6129391062809 2.9998e-05 deg
tp 2458528.250957562173
(2019-Feb-13.75095756)
9.8123e-05 TDB
period 1183.804581506418
3.24
7.5889e-06
2.078e-08
d
yr
n .3041042462784625 1.9495e-09 deg/d
Q 2.406766277061368 1.0286e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      13771 days (37.70 yr)  
   first obs. used      1981-10-30  
   last obs. used      2019-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:31:24  

Additional Information
 Earth MOID = .963981 au 
 Jupiter MOID = 2.56837 au 
 T_jup = 3.663 
[ 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 15.3   n/a MPO431701  
diameter diameter 2.209 km 0.632 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17631 (1996 HV21)          Discovered 1996-Apr-21 by JPL/GEODSS NEAT at Haleakala
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 HV21 = 1981 UK2 = 1999 CY54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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