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24178 (1999 XL7)
Classification: Main-belt Asteroid          SPK-ID: 2024178
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1055951606337982 2.3858e-08  
a 3.186941282893784 2.1799e-08 au
q 2.850415706196132 7.9243e-08 au
i 17.05276222589659 9.5468e-07 deg
node 68.90696475528323 4.4419e-06 deg
peri 304.1951913388985 8.3422e-06 deg
M 298.9926397212913 8.4161e-06 deg
tp 2459552.659373859103
(2021-Dec-04.15937386)
4.9661e-05 TDB
period 2078.066876031052
5.69
2.1321e-05
5.837e-08
d
yr
n .1732379280726385 1.7774e-09 deg/d
Q 3.523466859591436 2.4101e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1712  
   data-arc span      13838 days (37.89 yr)  
   first obs. used      1982-10-21  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:36:59  

Additional Information
 Earth MOID = 1.89136 au 
 Jupiter MOID = 1.98006 au 
 T_jup = 3.121 
[ 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 12.67   n/a E2021B10  
diameter diameter 15.958 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.196 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 0.083   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

24178 (1999 XL7)          Discovered 1999-Dec-04 by Juels, C. W. at Fountain Hills
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 XL7 = 1982 UQ7 = 2000 WD6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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