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227874 (2007 ER11)
Classification: Main-belt Asteroid          SPK-ID: 2227874
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1657704699392329 5.0512e-08  
a 2.31236425411368 8.0379e-09 au
q 1.929042545038572 1.1726e-07 au
i 3.440040709285671 5.3885e-06 deg
node 172.2857186632013 6.2931e-05 deg
peri 319.1328747463411 6.4306e-05 deg
M 357.5783297675027 1.2156e-05 deg
tp 2459209.139633112209
(2020-Dec-25.63963311)
4.3378e-05 TDB
period 1284.348248022129
3.52
6.6967e-06
1.833e-08
d
yr
n .2802978090672782 1.4615e-09 deg/d
Q 2.695685963188788 9.3703e-09 au
  Orbit Determination Parameters
   # obs. used (total)      401  
   data-arc span      10214 days (27.96 yr)  
   first obs. used      1993-03-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:41:29  

Additional Information
 Earth MOID = .944946 au 
 Jupiter MOID = 2.35053 au 
 T_jup = 3.563 
[ 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 17.4   n/a MPO454638  
diameter diameter 1.453 km 0.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.092   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

227874 (2007 ER11)          Discovered 2007-Mar-09 by Spacewatch at Kitt Peak
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

Alternate Designations
 2007 ER11 = 2002 WY9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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