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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 172 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4678408284810754 3.7221e-08  
a 2.250269501302646 5.4886e-09 au
q 1.19750155350752 8.2793e-08 au
i 12.91333341420751 4.8344e-06 deg
node 158.9496200597894 2.2208e-05 deg
peri 170.95472202701 2.2723e-05 deg
M 146.3017557670607 7.2814e-06 deg
tp 2458099.431310846003
(2017-Dec-11.93131085)
2.3599e-05 TDB
period 1232.963522205738
3.38
4.511e-06
1.235e-08
d
yr
n .2919794410105255 1.0683e-09 deg/d
Q 3.303037449097773 8.0564e-09 au
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      11945 days (32.70 yr)  
   first obs. used      1987-05-10  
   last obs. used      2020-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50245  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-23 10:57:27  

Additional Information
 Earth MOID = .188897 au 
 Jupiter MOID = 2.09148 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-January); 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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