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7875 (1991 ES1)
Classification: Main-belt Asteroid          SPK-ID: 2007875
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1785634985025933 4.6581e-08  
a 2.644392225746439 1.6313e-08 au
q 2.172200298504095 1.2342e-07 au
i 14.14486933748094 5.8643e-06 deg
node 165.4621121366961 2.0732e-05 deg
peri 264.5658530697862 2.6715e-05 deg
M 357.0511865254028 1.4914e-05 deg
tp 2457413.365658990072
(2016-Jan-25.86565899)
6.5056e-05 JED
period 1570.678266470742
4.30
1.4534e-05
3.979e-08
d
yr
n .2292003446440417 2.1208e-09 deg/d
Q 3.116584152988783 1.9225e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1377  
   data-arc span      14321 days (39.21 yr)  
   first obs. used      1976-09-28  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46957  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:05:22  

Additional Information
 Earth MOID = 1.23808 au 
 Jupiter MOID = 2.33934 au 
 T_jup = 3.328 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.3 mag n/a MPO347589  
rotation period rot_per 20.0462 h n/a LCDB (Rev. 2015-December); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

7875 (1991 ES1)          Discovered 1991-Mar-07 by Ueda, S., Kaneda, H. at Kushiro
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 ES1 = 1976 SL8 = 1993 PM4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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