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30737 (1981 ER9)
Classification: Outer Main-belt Asteroid          SPK-ID: 2030737
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07334524065252569 5.383e-08  
a 3.203283103417826 2.6351e-08 au
q 2.968337533319476 1.6737e-07 au
i 4.944691627067489 5.6005e-06 deg
node 299.7560478516152 5.198e-05 deg
peri 235.9125752367218 5.9751e-05 deg
M 343.6512557223419 2.8533e-05 deg
tp 2459295.598422147920
(2021-Mar-22.09842215)
0.00016595 TDB
period 2094.071042510383
5.73
2.5839e-05
7.074e-08
d
yr
n .1719139383009805 2.1213e-09 deg/d
Q 3.438228673516175 2.8284e-08 au
  Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      14652 days (40.11 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52752  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:19  

Additional Information
 Earth MOID = 1.97638 au 
 Jupiter MOID = 1.57359 au 
 T_jup = 3.184 
[ 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 14.51   n/a MPCxxxxx  
diameter diameter 8.261 km 0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30737 (1981 ER9)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

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