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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 120 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .508960729006859 3.0727e-08  
a 2.657914256223374 5.6956e-09 au
q 1.305140278738202 8.1204e-08 au
i 24.63087946445726 6.2586e-06 deg
node 180.3568522261797 9.0729e-06 deg
peri 84.03650608024203 1.1317e-05 deg
M 323.4000686966981 3.7024e-06 deg
tp 2459161.411708565339
(2020-Nov-07.91170857)
1.6423e-05 TDB
period 1582.741087776189
4.33
5.0875e-06
1.393e-08
d
yr
n .2274534999946287 7.3111e-10 deg/d
Q 4.010688233708547 8.5945e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1322  
   data-arc span      21761 days (59.58 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41519  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:09:44  

Additional Information
 Earth MOID = .536135 au 
 Jupiter MOID = 2.01549 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 15.3   n/a MPO425850  
rotation period rot_per 7.879 h n/a LCDB (Rev. 2019-August); 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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