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39738 (1997 AP2)
Classification: Main-belt Asteroid          SPK-ID: 2039738
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0933556390226343 4.0775e-08  
a 2.571013047598989 1.4204e-08 au
q 2.330994481604855 1.0391e-07 au
i 4.697930783238919 4.5492e-06 deg
node 132.7922634322135 6.1934e-05 deg
peri 334.0385633520008 6.7524e-05 deg
M 256.0891034323479 2.8148e-05 deg
tp 2459435.123734449399
(2021-Aug-08.62373445)
0.00011837 TDB
period 1505.756851014332
4.12
1.2478e-05
3.416e-08
d
yr
n .2390824253978928 1.9812e-09 deg/d
Q 2.811031613593123 1.553e-08 au
  Orbit Determination Parameters
   # obs. used (total)      857  
   data-arc span      9744 days (26.68 yr)  
   first obs. used      1991-10-03  
   last obs. used      2018-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5315  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 19:34:13  

Additional Information
 Earth MOID = 1.3488 au 
 Jupiter MOID = 2.2787 au 
 T_jup = 3.419 
[ 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 15.0   n/a MPO302293  
diameter diameter 2.549 km 0.342 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.393   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39738 (1997 AP2)          Discovered 1997-Jan-03 by Kobayashi, T. at Oizumi
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 AP2 = 1999 RL190 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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