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JPL Small-Body Database Browser
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9077 Ildo (1994 NC)
Classification: Main-belt Asteroid          SPK-ID: 2009077
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.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775649239185889 3.6703e-08  
a 2.687360919033784 1.2065e-08 au
q 2.210179881903761 9.6639e-08 au
i 11.96037900574389 4.2755e-06 deg
node 165.6047645520446 1.8555e-05 deg
peri 237.2562534365461 2.1824e-05 deg
M 142.1056030328455 1.1573e-05 deg
tp 2457965.321010938183
5.1044e-05 TDB
period 1609.116257079617
n .223725289217675 1.5066e-09 deg/d
Q 3.164541956163807 1.4207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1587  
   data-arc span      13768 days (37.69 yr)  
   first obs. used      1981-08-30  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51166  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:39:43  

Additional Information
 Earth MOID = 1.24173 au 
 Jupiter MOID = 2.34939 au 
 T_jup = 3.320 
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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 13.2   n/a MPO435785  
diameter diameter 4.872 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 15.323 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.428   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

9077 Ildo           Discovered 1994 July 3 at Farra d´Isonzo.
Named in memory of Ildo Lombardi (1934-1954), Italian gymnast and brother of Giuseppe Lombardi, a member of the team of amateur astronomers who discovered this minor planet. Ildo died by a fall from the parallel bars while training with the Italian team for the Melbourne Olympic games in 1956.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990202/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1994 NC = 1981 QA4 
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