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15230 Alona (1987 RF1)
Classification: Main-belt Asteroid          SPK-ID: 2015230
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1660730161343969 3.0992e-08  
a 2.283459234853172 6.1032e-09 au
q 1.904238272501164 7.061e-08 au
i 5.428144443452307 4.1682e-06 deg
node 167.7495556041783 3.2295e-05 deg
peri 248.6094095294629 3.4525e-05 deg
M 117.9564304571024 1.2439e-05 deg
tp 2458587.540518411284
(2019-Apr-14.04051841)
4.2905e-05 TDB
period 1260.341744793671
3.45
5.053e-06
1.383e-08
d
yr
n .2856368135762536 1.1452e-09 deg/d
Q 2.662680197205181 7.1168e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1855  
   data-arc span      11916 days (32.62 yr)  
   first obs. used      1987-09-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .527  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:08:59  

Additional Information
 Earth MOID = .923613 au 
 Jupiter MOID = 2.68963 au 
 T_jup = 3.579 
[ 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 14.6   n/a MPO452385  
diameter diameter 3.429 km 0.342 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15230 Alona           Discovered 1987 Sept. 13 by H. Debehogne at the European Southern Observatory.
Alona (b. 1997) is a daughter of Valentina Arkadievna Andreichenko, who performed the reductions for astrometric measurements by the discoverer and served as translator for the Tomsk-Uccle Observational Program.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1987 RF1 = 1998 YS27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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