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20073 Yumiko (1994 AN2)
Classification: Main-belt Asteroid          SPK-ID: 2020073
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06500521528602628 3.8237e-08  
a 2.299994946881383 7.8989e-09 au
q 2.150483280202586 8.8699e-08 au
i 6.591529196284802 3.4326e-06 deg
node 305.4059217648782 3.3395e-05 deg
peri 271.7781770596965 4.3706e-05 deg
M 111.2861201362799 2.7092e-05 deg
tp 2458606.653264191238
(2019-May-03.15326419)
9.6105e-05 TDB
period 1274.056681260215
3.49
6.5632e-06
1.797e-08
d
yr
n .2825619968837738 1.4556e-09 deg/d
Q 2.44950661356018 8.4123e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1533  
   data-arc span      9411 days (25.77 yr)  
   first obs. used      1993-11-21  
   last obs. used      2019-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51821  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 01:14:32  

Additional Information
 Earth MOID = 1.15497 au 
 Jupiter MOID = 2.55683 au 
 T_jup = 3.580 
[ 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 14.9   n/a MPO337428  
rotation period rot_per 3.49 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

20073 Yumiko           Discovered 1994 Jan. 9 by T. Kobayashi and H. Fujii at Oizumi.
Yumiko Fujii (b. 1968) is the wife of the second discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

[ show close-approach data ]
Alternate Designations
 1994 AN2 = 1998 FN111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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