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3617 Eicher (1984 LJ)
Classification: Main-belt Asteroid          SPK-ID: 2003617
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1115100899048917 2.2137e-08  
a 2.627254205444511 9.0401e-09 au
q 2.334288852792389 5.8858e-08 au
i 14.47568217114505 1.1195e-06 deg
node 181.4768057655613 1.4339e-06 deg
peri 36.08678142685334 9.8323e-06 deg
M 222.826095929087 1.2272e-05 deg
tp 2459793.180405145810
(2022-Aug-01.68040515)
5.4421e-05 TDB
period 1555.433938383725
4.26
8.0282e-06
2.198e-08
d
yr
n .2314466665000775 1.1946e-09 deg/d
Q 2.920219558096634 1.0048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2964  
   data-arc span      25853 days (70.78 yr)  
   first obs. used      1950-06-07  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39803  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:06:40  

Additional Information
 Earth MOID = 1.34329 au 
 Jupiter MOID = 2.06314 au 
 T_jup = 3.348 
[ 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 12.48   n/a MPCxxxxx  
diameter diameter 9.193 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.3050 h n/a LCDB (Rev. 2020-October); 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:
[Loera-Gonzalez, P.; Olguin, L.; Saucedo, J.C.; Nunez-Lopez, R.; Yahia-Keith, N.A. (2019) Minor Planet Bull. 46, 97-98.]
geometric albedo albedo 0.331   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3617 Eicher (1984 LJ)          Discovered 1984-Jun-02 by Skiff, B. A. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 LJ = 1950 LM = 1971 FU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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