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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1422228337516773 2.8494e-08  
a 3.154975526430327 1.5916e-08 au
q 2.706265966644216 8.762e-08 au
i 12.84615669293639 3.3378e-06 deg
node 111.8394845853362 1.6809e-05 deg
peri 192.6739859898911 2.1724e-05 deg
M 138.3284307387582 1.45e-05 deg
tp 2458213.995216557693
(2018-Apr-05.49521656)
8.1257e-05 TDB
period 2046.880171538714
5.60
1.5489e-05
4.241e-08
d
yr
n .1758774182317546 1.3309e-09 deg/d
Q 3.603685086216438 1.818e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3359  
   data-arc span      13533 days (37.05 yr)  
   first obs. used      1983-04-10  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38637  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:21:32  

Additional Information
 Earth MOID = 1.6924 au 
 Jupiter MOID = 1.63879 au 
 T_jup = 3.152 
[ 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 11.8   n/a MPO332870  
diameter diameter 21.485 km 0.225 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.0929 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.051   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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