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5418 Joyce (1981 QG1)
Classification: Main-belt Asteroid          SPK-ID: 2005418
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3105099103710813 4.1774e-08  
a 2.968839183023718 1.4133e-08 au
q 2.046985194396869 1.2654e-07 au
i 17.46644697011149 5.987e-06 deg
node 174.8185543165509 1.2687e-05 deg
peri 244.3168526330812 1.5434e-05 deg
M 79.56635104167106 8.5747e-06 deg
tp 2458187.542481506226
(2018-Mar-10.04248151)
4.3117e-05 TDB
period 1868.436904689758
5.12
1.3342e-05
3.653e-08
d
yr
n .1926744216496707 1.3758e-09 deg/d
Q 3.890693171650567 1.8522e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1692  
   data-arc span      15567 days (42.62 yr)  
   first obs. used      1976-09-25  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46215  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:05:44  

Additional Information
 Earth MOID = 1.12022 au 
 Jupiter MOID = 1.85671 au 
 T_jup = 3.122 
[ 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 13.0   n/a MPO340735  
diameter diameter 14.441 km 0.246 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.96 h n/a LCDB (Rev. 2019-January); 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:
[Simpson, G.; Chong, E.; Gerhardt, M.; Gorsky, S.; et al. (2013) Minor Planet Bull. 146-151.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.064   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5418 Joyce (1981 QG1)          Discovered 1981-Aug-29 by Mrkos, A. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 QG1 = 1976 SN7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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