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19110 (1981 EF29)
Classification: Main-belt Asteroid          SPK-ID: 2019110
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .139990512294261 4.3112e-08  
a 3.103642947736863 2.2918e-08 au
q 2.669162381504709 1.4444e-07 au
i 4.279017938550029 4.8802e-06 deg
node 327.2715337024911 7.4949e-05 deg
peri 325.5115647853401 7.8294e-05 deg
M 349.0000908172222 2.2346e-05 deg
tp 2459261.522873616987
(2021-Feb-16.02287362)
0.00012394 TDB
period 1997.128715981624
5.47
2.2121e-05
6.056e-08
d
yr
n .1802587870872678 1.9966e-09 deg/d
Q 3.538123513969016 2.6127e-08 au
  Orbit Determination Parameters
   # obs. used (total)      853  
   data-arc span      14379 days (39.37 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58942  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:46:01  

Additional Information
 Earth MOID = 1.65253 au 
 Jupiter MOID = 1.66837 au 
 T_jup = 3.202 
[ 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 14.26   n/a E2021B10  
diameter diameter 8.179 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.078 h n/a LCDB (Rev. 2020-October); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.055   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19110 (1981 EF29)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EF29 = 1999 RF129 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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