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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1154985089828345 3.0942e-08  
a 3.136385996233678 1.6149e-08 au
q 2.774138090074047 9.3891e-08 au
i 6.027046037971931 3.9329e-06 deg
node 140.2187848613943 3.9952e-05 deg
peri 334.7066960234208 4.4918e-05 deg
M 110.1992798892508 2.0921e-05 deg
tp 2458579.460902816747
(2019-Apr-05.96090282)
0.00011657 TDB
period 2028.816115773724
5.55
1.5669e-05
4.29e-08
d
yr
n .1774433854310684 1.3704e-09 deg/d
Q 3.498633902393311 1.8014e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1623  
   data-arc span      10828 days (29.65 yr)  
   first obs. used      1990-11-21  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:42:53  

Additional Information
 Earth MOID = 1.79181 au 
 Jupiter MOID = 1.59045 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456934.5 (2014-Oct-04.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1171642973162272 3.0966e-08  
q 2.768534773345833 9.4204e-08 au
tp 2456550.712939476897
(2013-Sep-15.21293948)
0.0001118 TDB
node 140.2369782884176 3.9958e-05 deg
peri 334.8952933732472 4.4776e-05 deg
i 6.027157435623044 3.933e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1623  
   data-arc span      10828 days (29.65 yr)  
   first obs. used      1990-11-21  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:42:53  

Additional Information
 Jupiter MOID = 1.59045 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.58922987553318E-16 -2.886378950608052E-15 7.61353987333555E-13 1.038866939281852E-15 1.294034424444222E-13 -2.567506509044998E-16
q -2.886378950608052E-15 8.874402609283468E-15 -2.201932216284345E-12 -2.146345135291212E-15 -3.669745354670473E-13 8.024887596021997E-16
tp 7.61353987333555E-13 -2.201932216284345E-12 1.249946621172541E-8 1.877841965857081E-12 2.287614182586843E-9 -9.713677626547331E-13
node 1.038866939281852E-15 -2.146345135291212E-15 1.877841965857081E-12 1.596674235338918E-9 -1.587108149339594E-9 5.532548314679063E-11
peri 1.294034424444222E-13 -3.669745354670473E-13 2.287614182586843E-9 -1.587108149339594E-9 2.004895989286238E-9 -5.521733741371672E-11
i -2.567506509044998E-16 8.024887596021997E-16 -9.713677626547331E-13 5.532548314679063E-11 -5.521733741371672E-11 1.546815566040282E-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 13.53   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

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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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