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JPL Small-Body Database Browser
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26820 (1987 SR9)
Classification: Main-belt Asteroid          SPK-ID: 2026820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2490272909699486 4.4669e-08  
a 2.323328487378706 7.5887e-09 au
q 1.744756288133479 1.0116e-07 au
i 4.183645350060647 6.174e-06 deg
node 39.35025358146993 5.4364e-05 deg
peri 275.530930152713 5.6152e-05 deg
M .5011087211537957 1.5795e-05 deg
tp 2458598.699497148325
(2019-Apr-25.19949715)
5.6747e-05 TDB
period 1293.493805317416
3.54
6.3374e-06
1.735e-08
d
yr
n .2783159830530909 1.3636e-09 deg/d
Q 2.901900686623934 9.4785e-09 au
  Orbit Determination Parameters
   # obs. used (total)      895  
   data-arc span      11754 days (32.18 yr)  
   first obs. used      1987-08-26  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54097  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:55:40  

Additional Information
 Earth MOID = .736558 au 
 Jupiter MOID = 2.40822 au 
 T_jup = 3.530 
[ 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 15.2   n/a MPO257052  

26820 (1987 SR9)          Discovered 1987-Sep-20 by Elst, E. W. at Smolyan
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1987 SR9 = 1987 RL = 1998 XJ66 = 2001 KG73 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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