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15978 (1998 QL1)
Classification: Main-belt Asteroid          SPK-ID: 2015978
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1199150386666158 4.4202e-08  
a 2.680897392598308 1.2359e-08 au
q 2.359417478103652 1.1877e-07 au
i 3.795532469305082 4.9794e-06 deg
node 206.9673216892647 5.5288e-05 deg
peri 171.708592109267 5.7557e-05 deg
M 310.2648767983136 1.7764e-05 deg
tp 2459222.002898026719
(2021-Jan-07.50289803)
7.989e-05 TDB
period 1603.31448192562
4.39
1.1087e-05
3.035e-08
d
yr
n .2245348645311499 1.5527e-09 deg/d
Q 3.002377307092964 1.3841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1174  
   data-arc span      12206 days (33.42 yr)  
   first obs. used      1986-12-30  
   last obs. used      2020-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:54:19  

Additional Information
 Earth MOID = 1.36155 au 
 Jupiter MOID = 2.45597 au 
 T_jup = 3.363 
[ 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 14.5   n/a MPO435848  
diameter diameter 3.809 km 0.638 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15978 (1998 QL1)          Discovered 1998-Aug-17 by Visnjan at Visnjan
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QL1 = 2000 CL4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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