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24251 (1999 XL117)
Classification: Main-belt Asteroid          SPK-ID: 2024251
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1531775221091329 3.41e-08  
a 2.314940464093757 7.8761e-09 au
q 1.960343619973709 7.8526e-08 au
i 6.836323184562565 3.2879e-06 deg
node 282.6299369704735 3.5784e-05 deg
peri 335.6993126145536 3.7993e-05 deg
M 141.4763291445757 1.3438e-05 deg
tp 2458694.920509106387
(2019-Jul-30.42050911)
4.7534e-05 TDB
period 1286.495188433288
3.52
6.5656e-06
1.798e-08
d
yr
n .2798300399696116 1.4281e-09 deg/d
Q 2.669537308213805 9.0826e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2210  
   data-arc span      10288 days (28.17 yr)  
   first obs. used      1992-12-01  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39427  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:38:20  

Additional Information
 Earth MOID = .945525 au 
 Jupiter MOID = 2.40602 au 
 T_jup = 3.557 
[ 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 14.72   n/a E2021B10  
rotation period rot_per 5.42391 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

24251 (1999 XL117)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XL117 = 1998 MX21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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