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30750 (1981 EY28)
Classification: Main-belt Asteroid          SPK-ID: 2030750
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046962668599597 3.5606e-08  
a 2.698370349573236 1.1623e-08 au
q 2.146024012409991 9.5941e-08 au
i 14.46073804135899 4.979e-06 deg
node 334.8376921667394 1.4603e-05 deg
peri 37.84161094852759 1.8852e-05 deg
M 145.9565937827362 1.2461e-05 deg
tp 2458544.094849962225
(2019-Mar-01.59484996)
5.4584e-05 TDB
period 1619.014584331505
4.43
1.046e-05
2.864e-08
d
yr
n .2223574781129256 1.4366e-09 deg/d
Q 3.250716686736482 1.4002e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1619  
   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      .46373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:24  

Additional Information
 Earth MOID = 1.16043 au 
 Jupiter MOID = 2.28122 au 
 T_jup = 3.293 
[ 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 14.23   n/a MPCxxxxx  
diameter diameter 5.334 km 1.667 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.142   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

30750 (1981 EY28)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EY28 = 1996 RO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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