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52455 Masamika (1995 AD1)
Classification: Main-belt Asteroid          SPK-ID: 2052455
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2017157430183678 8.0328e-08  
a 2.529699045305731 9.4319e-09 au
q 2.01941892276903 2.023e-07 au
i 18.94172711517059 8.0692e-06 deg
node 281.191511664378 1.3032e-05 deg
peri 177.9674000159548 1.8501e-05 deg
M 223.5539351581579 1.2109e-05 deg
tp 2459953.506452714718
(2023-Jan-09.00645271)
5.1131e-05 TDB
period 1469.608692707472
4.02
8.2191e-06
2.25e-08
d
yr
n .2449631672610545 1.37e-09 deg/d
Q 3.039979167842432 1.1334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      917  
   data-arc span      9705 days (26.57 yr)  
   first obs. used      1994-12-08  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47658  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:37:04  

Additional Information
 Earth MOID = 1.03658 au 
 Jupiter MOID = 2.14701 au 
 T_jup = 3.349 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456575.5 (2013-Oct-10.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2035349111363933 8.0951e-08  
q 2.012366417319538 2.0433e-07 au
tp 2457018.991120060297
(2014-Dec-27.49112006)
4.3716e-05 TDB
node 281.238932458345 1.3011e-05 deg
peri 178.0370867104008 1.8306e-05 deg
i 18.96875206267524 8.0773e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      917  
   data-arc span      9705 days (26.57 yr)  
   first obs. used      1994-12-08  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47658  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:37:04  

Additional Information
 Jupiter MOID = 2.14701 au 
 T_jup = 3.349 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.553064527918425E-15 -1.652984073730706E-14 1.39730127829953E-12 -4.365663242704406E-14 5.149664924800703E-13 -5.449737307828281E-15
q -1.652984073730706E-14 4.175196400906987E-14 -3.463793048552834E-12 1.099637766153373E-13 -1.289233442631383E-12 1.468390534984841E-14
tp 1.39730127829953E-12 -3.463793048552834E-12 1.911101529030118E-9 -1.57408391766757E-11 5.688302986041796E-10 -2.968220835252641E-12
node -4.365663242704406E-14 1.099637766153373E-13 -1.57408391766757E-11 1.692825049706988E-10 -1.639981119226929E-10 2.297798307958413E-11
peri 5.149664924800703E-13 -1.289233442631383E-12 5.688302986041796E-10 -1.639981119226929E-10 3.35092023664383E-10 -2.258619753791506E-11
i -5.449737307828281E-15 1.468390534984841E-14 -2.968220835252641E-12 2.297798307958413E-11 -2.258619753791506E-11 6.524304949191643E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.56   n/a MPCxxxxx  
diameter diameter 4.025 km 0.839 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.228   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

52455 Masamika           Discovered 1995 Jan. 6 by T. Seki at Geisei.
Masa-aki Takanashi (1959-2001) was an active member of the Gotemba Astronomical Circle and the Nippon Meteor Society. With his wife Mika he was devoted to the popularization of astronomy and meteor observations.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040107/MPCPages.arcLast Updated: 2004-01-07

Alternate Designations
 1995 AD1 = 1998 XZ23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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