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30728 (1979 QD2)
Classification: Main-belt Asteroid          SPK-ID: 2030728
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2227233402657317 4.5039e-08  
a 3.086260221316734 1.6214e-08 au
q 2.398878035895815 1.4298e-07 au
i 1.207618975787193 4.3547e-06 deg
node 29.26915460401726 0.00021661 deg
peri 304.1063309867988 0.00021671 deg
M 214.6806780554708 8.8605e-06 deg
tp 2459999.907283405604
(2023-Feb-24.40728341)
5.2053e-05 TDB
period 1980.374104249332
5.42
1.5606e-05
4.273e-08
d
yr
n .181783835300381 1.4326e-09 deg/d
Q 3.773642406737654 1.9826e-08 au
  Orbit Determination Parameters
   # obs. used (total)      829  
   data-arc span      15189 days (41.59 yr)  
   first obs. used      1979-08-22  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54696  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:16  

Additional Information
 Earth MOID = 1.3871 au 
 Jupiter MOID = 1.60805 au 
 T_jup = 3.187 
[ 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 14.94   n/a E2021B10  
diameter diameter 6.157 km 0.357 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30728 (1979 QD2)          Discovered 1979-Aug-22 by Lagerkvist, C.-I. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1979 QD2 = 1994 GN3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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