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JPL Small-Body Database Browser
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3207 Spinrad (1981 EY25)
Classification: Main-belt Asteroid          SPK-ID: 2003207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06102422564845532 3.2076e-08  
a 2.908839653582207 1.2711e-08 au
q 2.731329966186832 9.3373e-08 au
i 2.220215067689526 3.707e-06 deg
node 167.781661780579 9.2714e-05 deg
peri 156.0809223024012 9.8201e-05 deg
M 185.6014798146111 3.3302e-05 deg
tp 2459878.346121161570
(2022-Oct-25.84612116)
0.00016799 TDB
period 1812.083057139621
4.96
1.1877e-05
3.252e-08
d
yr
n .1986663903630671 1.3021e-09 deg/d
Q 3.086349340977582 1.3486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2761  
   data-arc span      20568 days (56.31 yr)  
   first obs. used      1963-10-14  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45486  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:41:16  

Additional Information
 Earth MOID = 1.71919 au 
 Jupiter MOID = 2.1121 au 
 T_jup = 3.280 
[ 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 12.4   n/a MPO337276  
diameter diameter 9.384 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.73 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.241   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3207 Spinrad (1981 EY25)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EY25 = 1963 TR = 1978 RM5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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