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74823 (1999 TD15)
Classification: Mars-crossing Asteroid          SPK-ID: 2074823
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2952305896072995 3.9204e-08  
a 2.358082921955434 1.1241e-08 au
q 1.661904710563627 9.263e-08 au
i 22.71750097544003 5.7937e-06 deg
node 213.4137907905815 1.1137e-05 deg
peri 231.7340646373557 1.5198e-05 deg
M 207.9829838880344 1.3471e-05 deg
tp 2459559.004580471428
(2021-Dec-10.50458047)
5.1979e-05 TDB
period 1322.62594091194
3.62
9.4572e-06
2.589e-08
d
yr
n .2721858001301433 1.9462e-09 deg/d
Q 3.05426113334724 1.4559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      7285 days (19.95 yr)  
   first obs. used      1999-07-22  
   last obs. used      2019-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4943  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:22:34  

Additional Information
 Earth MOID = .745438 au 
 Jupiter MOID = 2.49323 au 
 T_jup = 3.393 
[ 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 14.9   n/a MPO385288  
diameter diameter 2.374 km 0.329 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 33.451 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:
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]
geometric albedo albedo 0.377   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

74823 (1999 TD15)          Discovered 1999-Oct-10 by Kagawa, T. at Gekko
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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