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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06504322783822919 3.4692e-08  
a 2.299660904694247 6.69e-09 au
q 2.150083536519551 7.8728e-08 au
i 6.591641004135443 2.9352e-06 deg
node 305.4067582616993 3.1832e-05 deg
peri 271.614511884694 3.9165e-05 deg
M 167.9820363801826 2.3751e-05 deg
tp 2458606.133298216561
(2019-May-02.63329822)
8.359e-05 TDB
period 1273.779132893528
3.49
5.5583e-06
1.522e-08
d
yr
n .2826235653446613 1.2333e-09 deg/d
Q 2.449238272868943 7.1251e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      9958 days (27.26 yr)  
   first obs. used      1993-11-21  
   last obs. used      2021-02-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4884  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:12:40  

Additional Information
 Earth MOID = 1.15351 au 
 Jupiter MOID = 2.55585 au 
 T_jup = 3.581 
[ 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 14.96   n/a E2021B10  
rotation period rot_per 3.49 h n/a LCDB (Rev. 2020-October); 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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