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5542 Moffatt (1978 PT4)
Classification: Main-belt Asteroid          SPK-ID: 2005542
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583894637922653 4.0977e-08  
a 2.588707894092689 1.2234e-08 au
q 2.178683838832544 1.0872e-07 au
i 15.8885664302353 3.6925e-06 deg
node 116.4988383656079 1.5679e-05 deg
peri 263.2772994376579 1.9227e-05 deg
M 317.8839300527436 1.233e-05 deg
tp 2459178.478825502529
5.2365e-05 TDB
period 1521.328491978257
n .2366352841600137 1.6775e-09 deg/d
Q 2.998731949352835 1.4172e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2112  
   data-arc span      15338 days (41.99 yr)  
   first obs. used      1978-08-06  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3883  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:30:04  

Additional Information
 Earth MOID = 1.24586 au 
 Jupiter MOID = 2.61472 au 
 T_jup = 3.350 
[ show covariance matrix ]

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 12.3   n/a MPO344345  
diameter diameter 8.597 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.187 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Alvarez-Candal, A.; Duffard, R.; Angeli, C.A.; Lazzaro, D.; Fernandez, S. (2004) Icarus 172, 388-401.]
[Han, X.L.; Li, B.; Zhao, H.; Liu. W.; et al. (2013) Minor Planet Bull. 40, 99-100.]
geometric albedo albedo 0.345   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

5542 Moffatt           Discovered 1978 Aug. 6 at the Perth Observatory, Bickley.
Ethelwin Frances Flamsteed Moffatt (née Winzar, b. 1926) is a direct descendant of John Flamsteed, the first Astronomer Royal. Born in Fremantle, Western Australia, she now resides in Adelaide, where she and her husband, Mervyn Moffatt, are kind benefactors of the Perth Observatory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010902/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1978 PT4 = 1986 LL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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