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18941 (2000 QX50)
Classification: Main-belt Asteroid          SPK-ID: 2018941
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1154985078929221 3.1095e-08  
a 3.136385999782308 1.6237e-08 au
q 2.774138096631201 9.4246e-08 au
i 6.027046023555081 3.9545e-06 deg
node 140.2187843270021 4.0176e-05 deg
peri 334.7066949884058 4.5198e-05 deg
M 110.1992809969143 2.116e-05 deg
tp 2458579.460895520396
(2019-Apr-05.96089552)
0.00011786 TDB
period 2028.816119216946
5.55
1.5755e-05
4.313e-08
d
yr
n .1774433851299189 1.3779e-09 deg/d
Q 3.498633902933415 1.8112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1607  
   data-arc span      10828 days (29.65 yr)  
   first obs. used      1990-11-21  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53811  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:12:31  

Additional Information
 Earth MOID = 1.79181 au 
 Jupiter MOID = 1.59045 au 
 T_jup = 3.193 
[ 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 13.53   n/a E2021B10  
rotation period rot_per 9.14 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

18941 (2000 QX50)          Discovered 2000-Aug-24 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 QX50 = 1990 WW5 = 1998 HQ110 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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