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66824 (1999 UM26)
Classification: Main-belt Asteroid          SPK-ID: 2066824
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09274413187061149 3.4672e-08  
a 2.796874083589383 1.2276e-08 au
q 2.537480424755473 9.8952e-08 au
i 2.881555101855557 3.4478e-06 deg
node 256.4058276837786 7.7848e-05 deg
peri 60.91682285522862 8.0193e-05 deg
M 248.3921544373989 2.0611e-05 deg
tp 2459730.163471820721
(2022-May-30.66347182)
9.8816e-05 TDB
period 1708.471737755276
4.68
1.1248e-05
3.08e-08
d
yr
n .2107146358025191 1.3873e-09 deg/d
Q 3.056267742423292 1.3414e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2024  
   data-arc span      7845 days (21.48 yr)  
   first obs. used      1999-10-01  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48041  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:02:30  

Additional Information
 Earth MOID = 1.52358 au 
 Jupiter MOID = 2.17589 au 
 T_jup = 3.319 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.84   n/a E2021B10  
diameter diameter 5.114 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.681 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 0.269   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66824 (1999 UM26)          Discovered 1999-Oct-30 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 UM26 = 2000 YE60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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