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4881 Robmackintosh (1975 XJ)
Classification: Main-belt Asteroid          SPK-ID: 2004881
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04572738742564085 1.2366e-08  
a 2.314064341134642 7.3268e-09 au
q 2.208248224479718 2.8635e-08 au
i 8.084103842746307 3.4585e-07 deg
node 141.2443110998933 3.5783e-06 deg
peri 350.4438008399205 2.1663e-05 deg
M 217.0712662254325 2.1582e-05 deg
tp 2459710.979865828527
(2022-May-11.47986583)
7.7928e-05 TDB
period 1285.764918257255
3.52
6.1065e-06
1.672e-08
d
yr
n .2799889737915305 1.3298e-09 deg/d
Q 2.419880457789566 7.6619e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2114  
   data-arc span      16486 days (45.14 yr)  
   first obs. used      1975-12-01  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49076  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:53:53  

Additional Information
 Earth MOID = 1.22246 au 
 Jupiter MOID = 2.5811 au 
 T_jup = 3.568 
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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 14.33   n/a MPCxxxxx  
diameter diameter 3.021 km 0.456 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.336   0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4881 Robmackintosh           Discovered 1975 Dec. 1 by C. Torres at Cerro El Roble.
Roberto Mackintosh (1971-2012) was the President of the Asociación Argentina Amigos de la Astronomia (2009-2012) and worked to better coordinate amateur and professional activities.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20121228/MPCPages.arcLast Updated: 2013-01-02

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Alternate Designations
 1975 XJ = 1987 BF2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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