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5461 Autumn (1983 HB1)
Classification: Main-belt Asteroid          SPK-ID: 2005461
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427727085731595 4.5875e-08  
a 3.15785499643955 2.7915e-08 au
q 2.706999485316591 1.4052e-07 au
i 12.84390115322747 5.1141e-06 deg
node 111.9677189024231 2.3927e-05 deg
peri 191.69447498 3.1417e-05 deg
M 252.9403860602708 2.326e-05 deg
tp 2458210.050757240596
0.00013713 JED
period 2049.683018006682
n .1756369140190761 2.3289e-09 deg/d
Q 3.60871050756251 3.1901e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1582  
   data-arc span      12055 days (33.00 yr)  
   first obs. used      1983-04-10  
   last obs. used      2016-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49659  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:52:12  

Additional Information
 Earth MOID = 1.69246 au 
 Jupiter MOID = 1.62173 au 
 T_jup = 3.151 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8 mag n/a MPO332870  
diameter diameter 21.6 km n/a DASTCOM value unverified
geometric albedo albedo 0.0986   0.029 EAR-A-5-DDR-ALBEDOS-V1.0:IMPS IMPS quality code 2: from the PDS IMPS singleton file

5461 Autumn           Discovered 1983 Apr. 18 by N. G. Thomas at the Lowell Observatory's Anderson Mesa Station.
Autumn Dongxia Thomas, born on 2002 Jan. 15 in Wahun, China, is the discoverer's granddaughter.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030910/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1983 HB1 = 1934 PK = 1989 GS6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-05 10:28 UT
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