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4300 Marg Edmondson (1955 SG1)
Classification: Main-belt Asteroid          SPK-ID: 2004300
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.

Note: If the applet is not working, here are some notes that might help.
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 .09689168284490428 4.6794e-08  
a 2.332915292872981 6.5583e-09 au
q 2.106875204211906 1.1058e-07 au
i 3.791079809713608 4.7283e-06 deg
node 208.5433913014816 4.9824e-05 deg
peri 148.2078426797948 5.2624e-05 deg
M 69.20977959816453 1.6365e-05 deg
tp 2458750.285860779199
5.9176e-05 TDB
period 1301.508119842028
n .2766021928804374 1.1664e-09 deg/d
Q 2.558955381534057 7.1938e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2237  
   data-arc span      24496 days (67.07 yr)  
   first obs. used      1953-01-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48111  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:09:29  

Additional Information
 Earth MOID = 1.10383 au 
 Jupiter MOID = 2.81128 au 
 T_jup = 3.560 
[ 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 13.2   n/a MPO502194  
diameter diameter 3.971 km 0.246 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 9.328 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:
[Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Turk, J.; et al. (2013) Minor Planet Bull. 40, 65-67.]
geometric albedo albedo 0.588   0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4300 Marg Edmondson (1955 SG1)          Discovered 1955-Sep-18 by Indiana University at Brooklyn
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2168-Dec-13 03:45 < 00:01 Hebe 0.0423755858194012 0.0423668335476103 0.0423843408248176 5.59526877093565 5.59526874471636 2513252.656168426 0.997334778207325 692.220503272894 23.906968899534 -50.9617898522074 205971.586323174 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 17:09:45 2020-Feb-22 17:09

Alternate Designations
 1955 SG1 = 1955 UP = 1955 VG1 = 1969 QW = 1985 AG = 1986 HH = 1986 LR1 = 1987 SP6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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