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18440 (1994 NV1)
Classification: Main-belt Asteroid          SPK-ID: 2018440
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .284162599009566 4.4758e-08  
a 3.032790181401877 1.7544e-08 au
q 2.170984641204027 1.4228e-07 au
i 6.535575759002191 3.8075e-06 deg
node 128.2038139909781 4.5399e-05 deg
peri 162.2195229674749 4.619e-05 deg
M 356.4456204467791 9.5791e-06 deg
tp 2459219.546855023329
(2021-Jan-05.04685502)
5.1424e-05 TDB
period 1929.132132831714
5.28
1.6739e-05
4.583e-08
d
yr
n .1866124118059073 1.6192e-09 deg/d
Q 3.894595721599727 2.2529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      891  
   data-arc span      9942 days (27.22 yr)  
   first obs. used      1993-06-17  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57242  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:20  

Additional Information
 Earth MOID = 1.15391 au 
 Jupiter MOID = 1.33215 au 
 T_jup = 3.170 
[ 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 14.76   n/a E2021B10  
diameter diameter 4.181 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.111   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18440 (1994 NV1)          Discovered 1994-Jul-08 by Elst, E. W. at Caussols
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1994 NV1 = 1998 BY17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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