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39796 (1997 TD)
Classification: Amor [NEO]          SPK-ID: 2039796
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 184 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4681637688059381 3.6551e-08  
a 2.24978064061852 5.4732e-09 au
q 1.196514856919916 8.1278e-08 au
i 12.9171726642319 4.8288e-06 deg
node 158.9494361127866 1.9808e-05 deg
peri 170.9625245980641 2.042e-05 deg
M 263.1100541687032 7.5473e-06 deg
tp 2459332.230117261892
(2021-Apr-27.73011726)
2.6799e-05 TDB
period 1232.561760558915
3.37
4.4978e-06
1.231e-08
d
yr
n .2920746136378229 1.0658e-09 deg/d
Q 3.303046424317125 8.0356e-09 au
  Orbit Determination Parameters
   # obs. used (total)      832  
   data-arc span      12063 days (33.03 yr)  
   first obs. used      1987-05-10  
   last obs. used      2020-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49919  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 08:59:19  

Additional Information
 Earth MOID = .188825 au 
 Jupiter MOID = 2.09494 au 
 T_jup = 3.445 
[ 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 15.7   n/a MPO417092  
diameter diameter 2.131 km 0.591 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 223.5 h n/a LCDB (Rev. 2019-August); 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:
[Warner, B.D. (2015) Minor Planet Bull. 42, 172-183.]
geometric albedo albedo 0.205   0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

39796 (1997 TD)          Discovered 1997-Oct-01 by JPL/GEODSS NEAT at Haleakala
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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