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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .184390330489265 2.9014e-08  
a 2.396069783579689 6.2718e-09 au
q 1.954257684310089 6.9621e-08 au
i 2.806742493571634 3.852e-06 deg
node 347.4260047921399 5.532e-05 deg
peri 37.72323092907354 5.6079e-05 deg
M 202.9846464843457 9.3264e-06 deg
tp 2459791.363606521766
(2022-Jul-30.86360652)
3.5773e-05 TDB
period 1354.714004618846
3.71
5.3191e-06
1.456e-08
d
yr
n .2657387454271481 1.0434e-09 deg/d
Q 2.837881882849289 7.4283e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2922  
   data-arc span      33164 days (90.80 yr)  
   first obs. used      1929-10-01  
   last obs. used      2020-07-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4551  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:08:54  

Additional Information
 Earth MOID = .95768 au 
 Jupiter MOID = 2.62353 au 
 T_jup = 3.504 
[ 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 13.20   n/a E2021B10  
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. 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:
[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

[ show close-approach data ]
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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