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JPL Small-Body Database Browser
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39989 (1998 HP35)
Classification: Main-belt Asteroid          SPK-ID: 2039989
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08982268222095662 8.3012e-08  
a 2.537352502185963 1.7106e-08 au
q 2.309440694699564 2.0879e-07 au
i 9.471266953366952 6.0707e-06 deg
node 177.3938998032503 3.2331e-05 deg
peri 207.6174528629849 4.2771e-05 deg
M 344.1837992023735 3.0069e-05 deg
tp 2459065.358859093101
(2020-Aug-03.85885909)
0.00012337 TDB
period 1476.283057624062
4.04
1.4929e-05
4.087e-08
d
yr
n .2438556739785295 2.466e-09 deg/d
Q 2.765264309672363 1.8643e-08 au
  Orbit Determination Parameters
   # obs. used (total)      853  
   data-arc span      7808 days (21.38 yr)  
   first obs. used      1998-03-22  
   last obs. used      2019-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53581  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:50  

Additional Information
 Earth MOID = 1.31587 au 
 Jupiter MOID = 2.63138 au 
 T_jup = 3.423 
[ 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 14.4   n/a MPO474257  
diameter diameter 3.063 km 0.816 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.431   0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39989 (1998 HP35)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HP35 = 1999 RJ99 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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