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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2750349481059531 4.5668e-08  
a 2.33663315661144 8.4874e-09 au
q 1.693977377640163 1.0833e-07 au
i 11.18137012145772 4.6822e-06 deg
node 331.0683740278633 1.5753e-05 deg
peri 10.1509227722407 1.7307e-05 deg
M 74.15354933740997 5.0128e-06 deg
tp 2458731.771534734741
(2019-Sep-05.27153473)		 1.8479e-05 TDB
period 1304.620592809407
3.57		 7.1082e-06
1.946e-08		 d
yr
n .2759422946289433 1.5035e-09 deg/d
Q 2.979288935582717 1.0822e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1403  
   data-arc span      11791 days (32.28 yr)  
   first obs. used      1987-09-25  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47029  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:56:11  

Additional Information
 Earth MOID = .686353 au 
 Jupiter MOID = 2.4295 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 14.3   n/a MPO395156  
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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