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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766662757853176 3.471e-08  
a 2.689542363819677 1.1179e-08 au
q 2.214390930836815 9.219e-08 au
i 11.95749239481941 3.9755e-06 deg
node 165.5611437702646 1.8196e-05 deg
peri 237.1837540332164 2.1112e-05 deg
M 231.6862208274472 1.1513e-05 deg
tp 2459574.731227613546
(2021-Dec-26.23122761)
5.283e-05 TDB
period 1611.075936457931
4.41
1.0045e-05
2.75e-08
d
yr
n .2234531544127501 1.3932e-09 deg/d
Q 3.16469379680254 1.3154e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1812  
   data-arc span      14218 days (38.93 yr)  
   first obs. used      1981-08-30  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:04:25  

Additional Information
 Earth MOID = 1.24642 au 
 Jupiter MOID = 2.3515 au 
 T_jup = 3.319 
[ 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 13.3   n/a MPO473890  
diameter diameter 4.872 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.323 h n/a LCDB (Rev. 2019-August); 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

[ show close-approach data ]
Alternate Designations
 1994 NC = 1981 QA4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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