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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1738263540279255 1.6065e-08  
a 2.550821973699082 9.009e-09 au
q 2.107421890236653 3.9454e-08 au
i 7.662946790229892 4.5731e-07 deg
node 184.9632701655366 2.8084e-06 deg
peri 99.26486360008499 7.4555e-06 deg
M 99.90548708096264 6.3944e-06 deg
tp 2458787.542372743246
(2019-Oct-31.04237274)
2.5543e-05 TDB
period 1488.053861265445
4.07
7.8833e-06
2.158e-08
d
yr
n .241926726828191 1.2817e-09 deg/d
Q 2.99422205716151 1.0575e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2028  
   data-arc span      15116 days (41.39 yr)  
   first obs. used      1979-09-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45223  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:27:40  

Additional Information
 Earth MOID = 1.10601 au 
 Jupiter MOID = 2.20439 au 
 T_jup = 3.407 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.96   n/a E2021B10  

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

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