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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09453963615169166 3.8161e-08  
a 2.248551402884633 7.4798e-09 au
q 2.035974171387544 8.6816e-08 au
i 6.897352593971267 3.9549e-06 deg
node 236.5786173269611 3.1443e-05 deg
peri 316.8013066386249 3.723e-05 deg
M 278.9476596263879 2.2606e-05 deg
tp 2459277.778193517411
(2021-Mar-04.27819352)
7.8007e-05 TDB
period 1231.551725787873
3.37
6.1451e-06
1.682e-08
d
yr
n .2923141533253047 1.4586e-09 deg/d
Q 2.461128634381722 8.1869e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2032  
   data-arc span      22863 days (62.60 yr)  
   first obs. used      1957-04-30  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46346  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:23:10  

Additional Information
 Earth MOID = 1.03982 au 
 Jupiter MOID = 2.51848 au 
 T_jup = 3.613 
[ 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 13.1   n/a MPO502181  
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. 2019-August); 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

[ show close-approach data ]
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 | Close-Approach Data ]
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