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18370 (1991 NS2)
Classification: Main-belt Asteroid          SPK-ID: 2018370
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173082433842084 8.0273e-08  
a 2.552028706807544 2.1223e-08 AU
q 2.110317366998428 2.0727e-07 AU
i 7.661161252956733 6.3833e-06 deg
node 185.0178807607891 6.1362e-05 deg
peri 99.40007324911487 6.3981e-05 deg
M 239.2377733491855 2.2227e-05 deg
tp 2457300.022863671395
(2015-Oct-04.52286367)
9.4389e-05 JED
period 1489.109930389724
4.08
1.8575e-05
5.086e-08
d
yr
n .2417551536344817 3.0157e-09 deg/d
Q 2.993740046616661 2.4896e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      750  
   data-arc span      12658 days (34.66 yr)  
   first obs. used      1979-09-24  
   last obs. used      2014-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56769  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:03:14  

Additional Information
 Earth MOID = 1.11015 AU 
 T_jup = 3.406 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO256999  

18370 (1991 NS2)          Discovered 1991-Jul-12 by Holt, H. E. at Palomar (675)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 NS2 = 1979 SK8 = 1987 QB12 = 1987 RY3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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