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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156132740168885 3.1542e-08  
a 3.136692336970522 1.6547e-08 au
q 2.774049066309674 9.6218e-08 au
i 6.027002185933434 4.0474e-06 deg
node 140.2185650587992 4.0268e-05 deg
peri 334.7584212688233 4.5272e-05 deg
M 74.64657553791999 2.1083e-05 deg
tp 2458579.760099923299
(2019-Apr-06.26009992)
0.00011789 TDB
period 2029.113364358805
5.56
1.6056e-05
4.396e-08
d
yr
n .1774173914200004 1.4039e-09 deg/d
Q 3.499335607631369 1.846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1544  
   data-arc span      10752 days (29.44 yr)  
   first obs. used      1990-11-21  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54291  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:55:29  

Additional Information
 Earth MOID = 1.79181 au 
 Jupiter MOID = 1.59012 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456824.5 (2014-Jun-16.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172516584561507 3.1541e-08  
q 2.768488749557704 9.6444e-08 au
tp 2456550.816154238491
(2013-Sep-15.31615424)
0.00011289 TDB
node 140.2368024387417 4.0274e-05 deg
peri 334.9139083435684 4.514e-05 deg
i 6.027126588688059 4.0475e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1544  
   data-arc span      10752 days (29.44 yr)  
   first obs. used      1990-11-21  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54291  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:55:29  

Additional Information
 Jupiter MOID = 1.59012 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.948323698446293E-16 -3.009453598602046E-15 7.878921078508266E-13 9.440798659445645E-16 1.359607530512844E-13 -1.532406640890641E-16
q -3.009453598602046E-15 9.301367146287206E-15 -2.249436991441139E-12 -2.003625885061104E-15 -3.824023592486862E-13 4.820276560439155E-16
tp 7.878921078508266E-13 -2.249436991441139E-12 1.274334370077203E-8 -9.690635780007749E-13 2.330284335011926E-9 -2.663226417876177E-13
node 9.440798659445645E-16 -2.003625885061104E-15 -9.690635780007749E-13 1.622024986992115E-9 -1.612839839372469E-9 5.480876096276959E-11
peri 1.359607530512844E-13 -3.824023592486862E-13 2.330284335011926E-9 -1.612839839372469E-9 2.037630058213991E-9 -5.457312077849976E-11
i -1.532406640890641E-16 4.820276560439155E-16 -2.663226417876177E-13 5.480876096276959E-11 -5.457312077849976E-11 1.63820212408356E-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. 2019-August); 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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