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46542 (1987 AD)
Classification: Main-belt Asteroid          SPK-ID: 2046542
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2078902450001823 4.9935e-08  
a 2.57630292195517 1.5155e-08 au
q 2.040714676315224 1.2857e-07 au
i 29.7816994190913 9.7131e-06 deg
node 281.1289023022996 9.3503e-06 deg
peri 139.8562510798888 2.5334e-05 deg
M 64.27965103436509 2.0785e-05 deg
tp 2458730.810010985083
(2019-Sep-04.31001099)
8.708e-05 TDB
period 1510.406395850917
4.14
1.3327e-05
3.649e-08
d
yr
n .2383464483392809 2.1031e-09 deg/d
Q 3.111891167595116 1.8306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      891  
   data-arc span      16057 days (43.96 yr)  
   first obs. used      1976-05-01  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41484  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:33:35  

Additional Information
 Earth MOID = 1.10523 au 
 Jupiter MOID = 2.2548 au 
 T_jup = 3.214 
[ 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 MPO449295  
diameter diameter 6.443 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.089   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46542 (1987 AD)          Discovered 1987-Jan-04 by Palomar at Palomar
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 AD = 1998 WW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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