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9087 Neff (1995 SN3)
Classification: Main-belt Asteroid          SPK-ID: 2009087
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1704758319284506 2.7268e-08  
a 2.283392563713067 6.0684e-09 au
q 1.894129316794845 6.1495e-08 au
i 4.714780486332257 4.1169e-06 deg
node 336.6889784245544 3.8191e-05 deg
peri 315.3346244508575 4.0378e-05 deg
M 123.1596598867039 1.2767e-05 deg
tp 2458569.343159724710
(2019-Mar-26.84315972)
4.4399e-05 TDB
period 1260.286547087659
3.45
5.024e-06
1.375e-08
d
yr
n .2856493238239417 1.1387e-09 deg/d
Q 2.67265581063129 7.1029e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1873  
   data-arc span      9459 days (25.90 yr)  
   first obs. used      1994-03-14  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:11:21  

Additional Information
 Earth MOID = .881583 au 
 Jupiter MOID = 2.51983 au 
 T_jup = 3.580 
[ 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 14.4   n/a MPO344375  
diameter diameter 2.621 km 0.351 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.372   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9087 Neff           Discovered 1995 Sept. 29 at Klet.
Named for Vladimír Neff and Ondřej Neff. Vladimír Neff (1909-1983) was an outstanding Czech writer, well-known for his five-part chronicle, spanning the mid-nineteenth to the mid-twentieth century, of the Prague entrepreneur family, the Borns and the Nedobyls. His last work was a great ironic novel The Vesture of Mr. de Balzac. Ondřej Neff (b. 1945) is a Czech writer of science fiction, a journalist and son of Vladimír Neff. In 1996 he founded the first Czech independent Internet daily newspaper called Neviditelný pes, or "The Invisible Dog". He continues this work today. Name proposed by discoverers J. Ticha, M. Tichy and Z. Moravec.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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