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JPL Small-Body Database Browser
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15415 Rika (1998 CA1)
Classification: Main-belt Asteroid          SPK-ID: 2015415
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .228006189950915 4.599e-08  
a 2.201626460661421 6.2409e-09 au
q 1.699641999670892 1.0244e-07 au
i 7.477670099819518 4.1618e-06 deg
node 327.3019423112704 2.7695e-05 deg
peri 28.78669155177591 2.9053e-05 deg
M 75.60012605185575 6.766e-06 deg
tp 2458749.927214949971
(2019-Sep-23.42721495)
2.2533e-05 TDB
period 1193.201748845446
3.27
5.0735e-06
1.389e-08
d
yr
n .3017092460251082 1.2829e-09 deg/d
Q 2.70361092165195 7.6639e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1728  
   data-arc span      23813 days (65.20 yr)  
   first obs. used      1954-11-25  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:17:55  

Additional Information
 Earth MOID = .698761 au 
 Jupiter MOID = 2.74905 au 
 T_jup = 3.619 
[ 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 MPO502287  
diameter diameter 2.830 km 0.488 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
rotation period rot_per 6.3632 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2006) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.605   0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

15415 Rika           Discovered 1998 Feb. 4 by A. Nakamura at Kuma Kogen.
Rika Akana, girlfriend of Kanchi, is the heroine in Tokyo Love Story. Some stories of the TV drama were filmed on location in Kuma Town, where this minor planet was discovered.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1998 CA1 = 1983 PC1 = 1983 PH = 1997 WK22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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