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(2008 SR1)
Classification: Apollo [NEO, PHA]          SPK-ID: 3427522
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6504801457391306 2.8554e-08  
a 2.37185309707931 3.2846e-09 au
q .8290097488193521 6.7667e-08 au
i 16.88023538259272 1.3123e-05 deg
node 178.0415709525277 1.0226e-05 deg
peri 116.7815272013763 1.382e-05 deg
M 81.66477779260674 5.6231e-06 deg
tp 2458697.834868186708
(2019-Aug-02.33486819)
2.0797e-05 TDB
period 1334.228175205412
3.65
2.7715e-06
7.588e-09
d
yr
n .2698189160520283 5.6048e-10 deg/d
Q 3.914696445339267 5.4212e-09 au
  Orbit Determination Parameters
   # obs. used (total)      237  
   data-arc span      4056 days (11.10 yr)  
   first obs. used      2008-09-23  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37523  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 14:41:01  

Additional Information
 Earth MOID = .0292911 au 
 Jupiter MOID = 1.80175 au 
 T_jup = 3.175 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 20.3   n/a MPO149044  
rotation period rot_per 22.15 h n/a LCDB (Rev. 2020-October); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2020) http://www.asu.cas.cz/~ppravec/neo.htm]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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