Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1823006967329051 3.6096e-08  
a 2.183290464960975 4.8562e-09 au
q 1.785275092028281 7.8764e-08 au
i 5.196179151023073 3.3631e-06 deg
node 46.8795725050401 3.6892e-05 deg
peri 289.2601319899467 3.7809e-05 deg
M 144.3925145573286 8.0216e-06 deg
tp 2458727.884584797021
(2019-Sep-01.38458480)
2.5979e-05 TDB
period 1178.326660455246
3.23
3.9314e-06
1.076e-08
d
yr
n .3055179960546035 1.0193e-09 deg/d
Q 2.581305837893669 5.7415e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      11167 days (30.57 yr)  
   first obs. used      1990-08-24  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48232  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:51:50  

Additional Information
 Earth MOID = .782505 au 
 Jupiter MOID = 2.80054 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 15.03   n/a MPCxxxxx  
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. 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.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-13 17:12 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin