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19154 (1990 QX4)
Classification: Main-belt Asteroid          SPK-ID: 2019154
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1822623081622642 3.6292e-08  
a 2.18307917775951 5.1112e-09 au
q 1.785186127920083 7.9315e-08 au
i 5.196519348999248 3.9807e-06 deg
node 46.88598569192162 3.764e-05 deg
peri 289.2154014579332 3.9191e-05 deg
M 83.33551000720935 9.3432e-06 deg
tp 2458727.771669011574
(2019-Sep-01.27166901)
3.0609e-05 TDB
period 1178.155616343379
3.23
4.1376e-06
1.133e-08
d
yr
n .3055623510222918 1.0731e-09 deg/d
Q 2.580972227598936 6.0428e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1618  
   data-arc span      10755 days (29.45 yr)  
   first obs. used      1990-08-24  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:43:04  

Additional Information
 Earth MOID = .784263 au 
 Jupiter MOID = 2.80065 au 
 T_jup = 3.652 
[ 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 14.9   n/a MPO435877  
diameter diameter 2.686 km 0.575 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
rotation period rot_per 38.71 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.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]
geometric albedo albedo 0.245   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

19154 (1990 QX4)          Discovered 1990-Aug-24 by Holt, H. E. at Palomar
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 QX4 = 1999 JK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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