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20249 (1998 EM10)
Classification: Main-belt Asteroid          SPK-ID: 2020249
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628456642064999 3.9152e-08  
a 2.267704014219449 7.3443e-09 au
q 1.898418247800137 8.7257e-08 au
i 6.468038819370887 4.092e-06 deg
node 12.98350553767742 3.29e-05 deg
peri 218.0702566185081 3.4787e-05 deg
M 192.8724697564775 1.3702e-05 deg
tp 2459779.559878287135
(2022-Jul-19.05987829)
4.8942e-05 TDB
period 1247.320270212922
3.41
6.0594e-06
1.659e-08
d
yr
n .2886187361795595 1.4021e-09 deg/d
Q 2.636989780638762 8.5402e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1293  
   data-arc span      8883 days (24.32 yr)  
   first obs. used      1996-10-18  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:06  

Additional Information
 Earth MOID = .892141 au 
 Jupiter MOID = 2.36336 au 
 T_jup = 3.589 
[ 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 15.14   n/a E2021B10  
rotation period rot_per 99.1977 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.]

20249 (1998 EM10)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 EM10 = 1999 RQ97 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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