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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1730823841903 8.7322e-08  
a 2.552028707739542 2.2489e-08 AU
q 2.110317494481892 2.2609e-07 AU
i 7.661153468241943 6.7839e-06 deg
node 185.0178685383113 6.6809e-05 deg
peri 99.40010170785288 6.9614e-05 deg
M 239.2377588844678 2.3988e-05 deg
tp 2457300.022923777130
(2015-Oct-04.52292378)
0.00010188 JED
period 1489.109931205455
4.08
1.9684e-05
5.389e-08
d
yr
n .2417551535020488 3.1956e-09 deg/d
Q 2.993739920997192 2.6382e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      737  
   data-arc span      12611 days (34.53 yr)  
   first obs. used      1979-09-24  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57104  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:12:14  

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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