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JPL Small-Body Database Browser
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4116 Elachi (1982 SU)
Classification: Inner Main-belt Asteroid          SPK-ID: 2004116
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0804147415734055 5.108e-08  
a 1.872517921140675 5.3226e-09 au
q 1.721939876420577 9.7355e-08 au
i 24.11139890051763 6.8311e-06 deg
node 185.0839730538168 8.634e-06 deg
peri 322.7865489922502 4.0332e-05 deg
M 113.8840960112642 3.6919e-05 deg
tp 2458704.427562479776
(2019-Aug-08.92756248)
9.6378e-05 TDB
period 935.9171406755348
2.56
3.9905e-06
1.093e-08
d
yr
n .3846494356756367 1.64e-09 deg/d
Q 2.023095965860773 5.7506e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1903  
   data-arc span      15455 days (42.31 yr)  
   first obs. used      1977-10-11  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4199  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:04:57  

Additional Information
 Earth MOID = .746493 au 
 Jupiter MOID = 2.96858 au 
 T_jup = 3.870 
[ 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 13.8   n/a MPO467676  
diameter diameter 4.693 km 0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 38.143 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2006) Minor Planet Bull. 33, 35-39.]
[Warner, B.D (2011) Minor Planet Bull. 38, 25-31.]
[Warner, B.D. (2012) Minor Planet Bull. 39, 245-252.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.245   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sl   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4116 Elachi (1982 SU)          Discovered 1982-Sep-20 by Helin, E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 SU = 1976 GA4 = 1989 EK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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