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15703 Yrjola (1987 SU1)
Classification: Main-belt Asteroid          SPK-ID: 2015703
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329937504196904 3.3756e-08  
a 2.209322779260999 8.5855e-09 au
q 1.915496656959425 7.5386e-08 au
i 6.024641557300907 4.3547e-06 deg
node 254.4988028893366 3.9378e-05 deg
peri 122.6003599192882 4.3916e-05 deg
M 332.3130380584782 2.2162e-05 deg
tp 2459092.748642808719
(2020-Aug-31.24864281)
7.4149e-05 TDB
period 1199.463902225215
3.28
6.9917e-06
1.914e-08
d
yr
n .3001340843456289 1.7495e-09 deg/d
Q 2.503148901562573 9.7273e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1306  
   data-arc span      23744 days (65.01 yr)  
   first obs. used      1954-07-28  
   last obs. used      2019-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:25:43  

Additional Information
 Earth MOID = .925642 au 
 Jupiter MOID = 2.96794 au 
 T_jup = 3.640 
[ 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 14.8   n/a MPO337391  
diameter diameter 2.832 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.349   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15703 Yrj{ö}l{ä}           Discovered 1987 Sept. 21 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Ilkka Yrj{ö}l{ä} (b. 1959), a long-term dedicated amateur astronomer in Kuusankoski, Finland, who has observed meteor showers using systematic counts of reflections by meteor forward scatter. He has confirmed many meteor outbursts, including the 1994 Aurigid shower.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

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Alternate Designations
 1987 SU1 = 1954 OY = 1989 EG12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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