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4587 Rees (3239 T-2)
Classification: Mars-crossing Asteroid          SPK-ID: 2004587
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 122 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5090049209887874 3.0667e-08  
a 2.658021131022162 5.6568e-09 au
q 1.305075295239699 8.1058e-08 au
i 24.63157121283661 6.2443e-06 deg
node 180.3549019753017 9.057e-06 deg
peri 84.04456896713499 1.1297e-05 deg
M 8.888680757186387 3.7351e-06 deg
tp 2459161.418531111197
(2020-Nov-07.91853111)
1.6385e-05 TDB
period 1582.836551823975
4.33
5.0529e-06
1.383e-08
d
yr
n .2274397818177472 7.2606e-10 deg/d
Q 4.010966966804625 8.5362e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1333  
   data-arc span      21812 days (59.72 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:32:05  

Additional Information
 Earth MOID = .535433 au 
 Jupiter MOID = 2.01465 au 
 T_jup = 3.076 
[ 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 15.34   n/a E2021B10  
rotation period rot_per 7.879 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2003) http://www.asu.cas.cz/~ppravec/neo.htm]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Stephens, R.D. (2016) Minor Planet Bull. 43, 336-339.]

4587 Rees (3239 T-2)          Discovered 1973-Sep-30 by van Houten and Gehrels at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 3239 T-2 = 1990 HQ = 6378 P-L 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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