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JPL Small-Body Database Browser
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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1199150341556883 4.4814e-08  
a 2.680897390898159 1.2689e-08 au
q 2.35941748870071 1.2002e-07 au
i 3.795531583543523 5.0733e-06 deg
node 206.9673183876176 5.5373e-05 deg
peri 171.7085937044173 5.771e-05 deg
M 310.2648792112676 1.8224e-05 deg
tp 2459222.002887069557
(2021-Jan-07.50288707)
8.2001e-05 TDB
period 1603.314480400456
4.39
1.1383e-05
3.116e-08
d
yr
n .2245348647447404 1.5941e-09 deg/d
Q 3.002377293095607 1.421e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1163  
   data-arc span      11895 days (32.57 yr)  
   first obs. used      1986-12-30  
   last obs. used      2019-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57805  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:32:18  

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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