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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08071717263331214 2.3873e-08  
a 1.872098846625067 4.6382e-09 au
q 1.720988320835407 4.4733e-08 au
i 24.11830610814954 8.1403e-07 deg
node 185.064059199564 2.12e-06 deg
peri 322.938304129145 1.3781e-05 deg
M 266.0806320815811 1.5954e-05 deg
tp 2459640.586775817815
(2022-Mar-02.08677582)
4.1669e-05 TDB
period 935.6029671189983
2.56
3.477e-06
9.52e-09
d
yr
n .3847786001668505 1.43e-09 deg/d
Q 2.023209372414728 5.0126e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2345  
   data-arc span      15800 days (43.26 yr)  
   first obs. used      1977-10-11  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39731  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:15:57  

Additional Information
 Earth MOID = .746232 au 
 Jupiter MOID = 2.9665 au 
 T_jup = 3.871 
[ 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 13.81   n/a E2021B10  
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. 2020-October); 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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