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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173268023998873 8.0293e-08  
a 2.551111116210419 2.0978e-08 AU
q 2.109085134103081 2.0743e-07 AU
i 7.663404847609645 6.385e-06 deg
node 185.0108944152208 6.1342e-05 deg
peri 99.52241490728288 6.3962e-05 deg
M 287.493391361205 2.2448e-05 deg
tp 2457300.255790386265
(2015-Oct-04.75579039)
9.4316e-05 JED
period 1488.306880778818
4.07
1.8358e-05
5.026e-08
d
yr
n .2418855980909093 2.9836e-09 deg/d
Q 2.993137098317758 2.4613e-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 = 1.11079 AU 
 T_jup = 3.407 
[ 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 13.8 mag n/a MPO296285  

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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