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8855 Miwa (1991 JL)
Classification: Main-belt Asteroid          SPK-ID: 2008855
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1669545919856633 3.2384e-08  
a 2.278908301169753 7.3356e-09 au
q 1.898434095575216 7.2739e-08 au
i 5.541246412922831 4.2779e-06 deg
node 191.1697817865761 3.6239e-05 deg
peri 40.11996290195192 3.8611e-05 deg
M 155.3698999730295 1.3005e-05 deg
tp 2458458.183163177977
(2018-Dec-05.68316318)
4.4858e-05 TDB
period 1256.575831546643
3.44
6.0672e-06
1.661e-08
d
yr
n .2864928569865122 1.3833e-09 deg/d
Q 2.65938250676429 8.5603e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1568  
   data-arc span      13020 days (35.65 yr)  
   first obs. used      1984-04-04  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5102  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:03:41  

Additional Information
 Earth MOID = .892266 au 
 Jupiter MOID = 2.33194 au 
 T_jup = 3.582 
[ 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 14.3   n/a MPO337332  

8855 Miwa           Discovered 1991 May 3 by S. Otomo and O. Muramatsu at Kiyosato.
Named in honor of Miwa Saito, a junior high school science teacher. She has made an effort to popularize science and astronomy on her World Wide Web site.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990202/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 1991 JL = 1984 GQ = 1985 RL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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