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30730 (1981 DL)
Classification: Main-belt Asteroid          SPK-ID: 2030730
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08296170748037759 3.9856e-08  
a 3.145469795213687 2.4324e-08 au
q 2.884516250174806 1.2006e-07 au
i 9.25517539005812 4.9461e-06 deg
node 232.9693181811057 2.9075e-05 deg
peri 251.6591576820304 4.4449e-05 deg
M 96.1814323627264 3.2503e-05 deg
tp 2458656.103348464704
(2019-Jun-21.60334846)
0.00018344 TDB
period 2037.636472428505
5.58
2.3635e-05
6.471e-08
d
yr
n .1766752827951412 2.0493e-09 deg/d
Q 3.406423340252569 2.6342e-08 au
  Orbit Determination Parameters
   # obs. used (total)      792  
   data-arc span      14348 days (39.28 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51985  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:31  

Additional Information
 Earth MOID = 1.91738 au 
 Jupiter MOID = 1.78441 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 14.47   n/a E2021B10  

30730 (1981 DL)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 DL = 1998 HH60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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