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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156132737408324 3.1117e-08  
a 3.136692337135734 1.6306e-08 au
q 2.774049067321689 9.4391e-08 au
i 6.027002725904036 3.9549e-06 deg
node 140.2185634011568 4.0181e-05 deg
peri 334.7584229506767 4.5185e-05 deg
M 74.64657544744507 2.1043e-05 deg
tp 2458579.760100400013
(2019-Apr-06.26010040)
0.0001177 TDB
period 2029.113364519118
5.56
1.5823e-05
4.332e-08
d
yr
n .1774173914059833 1.3835e-09 deg/d
Q 3.49933560694978 1.8191e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1605  
   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      .53835  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:11:49  

Additional Information
 Earth MOID = 1.79181 au 
 Jupiter MOID = 1.59012 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456926.5 (2014-Sep-26.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1171697471136215 3.1125e-08  
q 2.768524807803893 9.4588e-08 au
tp 2456550.715859044054
(2013-Sep-15.21585904)
0.00011287 TDB
node 140.2369930070691 4.0189e-05 deg
peri 334.8954746961608 4.5059e-05 deg
i 6.027158463396174 3.955e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1605  
   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      .53835  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:11:49  

Additional Information
 Jupiter MOID = 1.59012 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.687875284522983E-16 -2.91306295734712E-15 8.089156749476518E-13 1.171871972590214E-15 1.374228984293501E-13 -2.456130718517806E-16
q -2.91306295734712E-15 8.946937216766656E-15 -2.328197148787285E-12 -2.566094594749695E-15 -3.882275505884345E-13 7.676120519930031E-16
tp 8.089156749476518E-13 -2.328197148787285E-12 1.273915454205973E-8 1.483944711859304E-12 2.328963583177813E-9 -1.017519944360127E-12
node 1.171871972590214E-15 -2.566094594749695E-15 1.483944711859304E-12 1.615155283693476E-9 -1.605558909853449E-9 5.702674027397274E-11
peri 1.374228984293501E-13 -3.882275505884345E-13 2.328963583177813E-9 -1.605558909853449E-9 2.030315667965629E-9 -5.691756439896419E-11
i -2.456130718517806E-16 7.676120519930031E-16 -1.017519944360127E-12 5.702674027397274E-11 -5.691756439896419E-11 1.564228600323059E-11

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 13.5   n/a MPO337418  
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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