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JPL Small-Body Database Browser
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2487 Juhani (1940 RL)
Classification: Main-belt Asteroid          SPK-ID: 2002487
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .184238230357523 2.9021e-08  
a 2.396383922250335 6.3231e-09 au
q 1.954878389157714 6.966e-08 au
i 2.806616411618289 3.8619e-06 deg
node 347.4244568295656 5.5976e-05 deg
peri 37.74705976978639 5.6743e-05 deg
M 149.8118458696916 9.3151e-06 deg
tp 2458436.633001984149
(2018-Nov-14.13300198)
3.4622e-05 TDB
period 1354.980429666902
3.71
5.3629e-06
1.468e-08
d
yr
n .2656864941499559 1.0516e-09 deg/d
Q 2.837889455342956 7.4881e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2791  
   data-arc span      33082 days (90.57 yr)  
   first obs. used      1929-10-01  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:40:49  

Additional Information
 Earth MOID = .959582 au 
 Jupiter MOID = 2.62232 au 
 T_jup = 3.504 
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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 13.1   n/a MPO313438  
diameter diameter 9.507 km 2.508 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 344.6 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:
[Polakis, T.; Skiff, B. (2019) Minor Planet Bull. 46, 132-137.]
geometric albedo albedo 0.028   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

2487 Juhani (1940 RL)          Discovered 1940-Sep-08 by Alikoski, H. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1940 RL = 1929 TD = 1976 GT8 = 1977 RD8 = 1979 BG = 1979 FG1 = 1981 UB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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