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2975 Spahr (1970 AF1)
Classification: Main-belt Asteroid          SPK-ID: 2002975
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09443271070556228 1.9279e-08  
a 2.248433644546425 6.1132e-09 au
q 2.03610796065032 4.2889e-08 au
i 6.897114394083203 4.7803e-07 deg
node 236.5724176572953 4.0308e-06 deg
peri 316.8010202015666 8.5006e-06 deg
M 337.4084992526016 1.1305e-05 deg
tp 2459277.778933683772
(2021-Mar-04.27893368)
3.8818e-05 TDB
period 1231.454981111054
3.37
5.0222e-06
1.375e-08
d
yr
n .292337117898697 1.1922e-09 deg/d
Q 2.460759328442531 6.6904e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2568  
   data-arc span      23337 days (63.89 yr)  
   first obs. used      1957-04-30  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44113  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:39:09  

Additional Information
 Earth MOID = 1.03918 au 
 Jupiter MOID = 2.51773 au 
 T_jup = 3.614 
[ 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 13.14   n/a E2021B10  
diameter diameter 5.919 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.946 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.419   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2975 Spahr (1970 AF1)          Discovered 1970-Jan-08 by Potter, H. and Lokalov, A. at Cerro El Roble
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1970 AF1 = 1957 HU = 1967 GH = 1970 AK1 = 1970 CB = 1978 PF4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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