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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04525231009623989 3.281e-08  
a 2.315177608165744 7.9138e-09 au
q 2.210410473113157 7.4887e-08 au
i 8.08131533143502 3.6646e-06 deg
node 141.2465901076781 2.4637e-05 deg
peri 350.0586305928878 4.8203e-05 deg
M 161.5038885569633 4.2547e-05 deg
tp 2458423.261380222222
(2018-Oct-31.76138022)
0.00015136 TDB
period 1286.692877656044
3.52
6.5973e-06
1.806e-08
d
yr
n .2797870465062405 1.4346e-09 deg/d
Q 2.419944743218331 8.2719e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1814  
   data-arc span      16320 days (44.68 yr)  
   first obs. used      1975-12-01  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50269  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:21:09  

Additional Information
 Earth MOID = 1.22479 au 
 Jupiter MOID = 2.58211 au 
 T_jup = 3.567 
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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 14.4   n/a MPO435745  
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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