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JPL Small-Body Database Browser
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172771 (2004 ER3)
Classification: Main-belt Asteroid          SPK-ID: 2172771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1361211937062934 7.6347e-08  
a 2.560855107132602 1.7461e-08 au
q 2.212268453040854 1.9825e-07 au
i 8.094857331086645 6.8239e-06 deg
node 96.35318956771286 4.6693e-05 deg
peri 23.18665206202084 5.1695e-05 deg
M 24.60764065283756 2.1281e-05 deg
tp 2458898.184033161228
(2020-Feb-18.68403316)
8.8257e-05 TDB
period 1496.841919207337
4.10
1.5309e-05
4.191e-08
d
yr
n .2405063590085989 2.4598e-09 deg/d
Q 2.909441761224349 1.9838e-08 au
  Orbit Determination Parameters
   # obs. used (total)      368  
   data-arc span      9187 days (25.15 yr)  
   first obs. used      1994-11-11  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58105  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 21:47:38  

Additional Information
 Earth MOID = 1.23098 au 
 Jupiter MOID = 2.18749 au 
 T_jup = 3.408 
[ 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 16.0   n/a MPO417929  

172771 (2004 ER3)          Discovered 2004-Mar-10 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Alternate Designations
 2004 ER3 = 2000 FH18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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