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30817 (1990 QN9)
Classification: Main-belt Asteroid          SPK-ID: 2030817
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1103861041135667 5.6193e-09  
a 2.265959249706728 5.9884e-09 au
q 2.015828836051501 1.1347e-08 au
i 4.336460791739965 6.1279e-07 deg
node 129.0791491713541 7.5866e-06 deg
peri 324.1952434819783 1.3024e-05 deg
M 218.1961653743496 1.2359e-05 deg
tp 2459691.251961672411
(2022-Apr-21.75196167)
4.3364e-05 TDB
period 1245.881020555353
3.41
4.9389e-06
1.352e-08
d
yr
n .2889521503743026 1.1455e-09 deg/d
Q 2.516089663361954 6.6495e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1987  
   data-arc span      10980 days (30.06 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50513  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:40:28  

Additional Information
 Earth MOID = 1.03417 au 
 Jupiter MOID = 2.62087 au 
 T_jup = 3.604 
[ 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 14.40   n/a MPCxxxxx  
diameter diameter 3.413 km 0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.347   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30817 (1990 QN9)          Discovered 1990-Aug-16 by Elst, E. W. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QN9 = 1992 EL12 = 1993 OU13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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