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15231 Ehdita (1987 RO5)
Classification: Outer Main-belt Asteroid          SPK-ID: 2015231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2928104214682478 3.185e-08  
a 3.940913567052547 2.4794e-08 au
q 2.786973004513955 1.2574e-07 au
i 6.814520280499887 3.8487e-06 deg
node 158.303268682488 3.6559e-05 deg
peri 215.7538145114059 3.7198e-05 deg
M 54.43795511072265 6.5337e-06 deg
tp 2458568.391216684473
(2019-Mar-25.89121668)
5.1034e-05 TDB
period 2857.549694458478
7.82
2.6967e-05
7.383e-08
d
yr
n .1259820610287661 1.1889e-09 deg/d
Q 5.094854129591139 3.2054e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2131  
   data-arc span      12110 days (33.16 yr)  
   first obs. used      1987-09-04  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45637  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:34:58  

Additional Information
 Earth MOID = 1.79125 au 
 Jupiter MOID = .422948 au 
 T_jup = 2.973 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0   n/a MPO452385  
diameter diameter 23.457 km 0.265 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 40.0 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:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 43-45.]
geometric albedo albedo 0.061   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

15231 Ehdita           Discovered 1987 Sept. 4 by L. V. Zhuravleva at the Crimean Astrophysical Observatory.
Ehdita Stanislavovna P'ekha (b. 1937) is a Russian singer. She gave concerts in more than 20 countries and won many international competitions, including the World Youth Festivals in Moscow (1957) and Sofia (1968). In 1988 she was honored with the title of People's Artist of the U.S.S.R.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

Alternate Designations
 1987 RO5 = 1996 BC4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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