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249657 (1999 UF45)
Classification: Main-belt Asteroid          SPK-ID: 2249657
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2347312735374305 5.5171e-08  
a 3.098623635688874 3.3052e-08 au
q 2.371279763470441 1.7331e-07 au
i 14.22750832619444 6.6922e-06 deg
node 247.6416482180179 2.8123e-05 deg
peri 147.5571017616657 3.2828e-05 deg
M 204.667149052611 1.8559e-05 deg
tp 2459460.131820748809
(2021-Sep-02.63182075)
0.00011288 TDB
period 1992.28594326378
5.45
3.1877e-05
8.727e-08
d
yr
n .180696953274812 2.8912e-09 deg/d
Q 3.825967507907306 4.0811e-08 au
  Orbit Determination Parameters
   # obs. used (total)      308  
   data-arc span      7215 days (19.75 yr)  
   first obs. used      1999-09-08  
   last obs. used      2019-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5854  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:18:55  

Additional Information
 Earth MOID = 1.39181 au 
 Jupiter MOID = 1.65907 au 
 T_jup = 3.133 
[ 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 15.3   n/a MPO440260  
diameter diameter 2.192 km 0.532 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.871 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.306   0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249657 (1999 UF45)          Discovered 1999-Oct-31 by CSS at Catalina
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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