Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
9087 Neff (1995 SN3)
Classification: Main-belt Asteroid          SPK-ID: 2009087
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1703461502465147 2.7247e-08  
a 2.283673786997185 5.8878e-09 au
q 1.894658748963336 6.1447e-08 au
i 4.715087486257252 3.5436e-06 deg
node 336.6836074428908 3.3851e-05 deg
peri 315.4199469993883 3.543e-05 deg
M 236.1547800708181 1.1377e-05 deg
tp 2459830.136944049840
4.0533e-05 TDB
period 1260.519380136027
n .2855965609677108 1.1045e-09 deg/d
Q 2.672688825031035 6.8908e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2201  
   data-arc span      9888 days (27.07 yr)  
   first obs. used      1994-03-14  
   last obs. used      2021-04-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47773  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:57:47  

Additional Information
 Earth MOID = .88171 au 
 Jupiter MOID = 2.51826 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 14.43   n/a MPCxxxxx  
diameter diameter 2.621 km 0.351 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.372   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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 ]
FirstGov 2021-Sep-25 10:50 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin