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15815 (1994 PY18)
Classification: Main-belt Asteroid          SPK-ID: 2015815
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2750908056406883 1.675e-08  
a 2.336881508842859 7.2742e-09 au
q 1.694026891888449 3.8153e-08 au
i 11.18197648557155 3.0964e-07 deg
node 331.0653630443655 5.0209e-06 deg
peri 10.17841098655338 6.4105e-06 deg
M 129.2991393237436 3.3903e-06 deg
tp 2458731.852183080297
(2019-Sep-05.35218308)
1.2012e-05 TDB
period 1304.828593395838
3.57
6.0925e-06
1.668e-08
d
yr
n .2758983071202433 1.2882e-09 deg/d
Q 2.979736125797268 9.2753e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1695  
   data-arc span      12225 days (33.47 yr)  
   first obs. used      1987-09-25  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45672  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:09:57  

Additional Information
 Earth MOID = .68456 au 
 Jupiter MOID = 2.42964 au 
 T_jup = 3.491 
[ 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 14.40   n/a E2021B10  
diameter diameter 4.752 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.103   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15815 (1994 PY18)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PY18 = 1987 ST16 = 1994 RU24 = 2000 EJ86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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