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19560 (1999 JH81)
Classification: Main-belt Asteroid          SPK-ID: 2019560
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 .1410114999645574 1.8627e-08  
a 2.59860261404241 1.03e-08 au
q 2.23216976162447 4.8742e-08 au
i 12.89212441385014 6.6317e-07 deg
node 238.3819437349632 3.1713e-06 deg
peri 49.2088305285118 9.4835e-06 deg
M 44.87025025254502 7.0148e-06 deg
tp 2459009.794058296311
(2020-Jun-09.29405830)
2.9709e-05 TDB
period 1530.059195723649
4.19
9.0969e-06
2.491e-08
d
yr
n .2352850144662123 1.3989e-09 deg/d
Q 2.96503546646035 1.1752e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1977  
   data-arc span      10698 days (29.29 yr)  
   first obs. used      1991-10-06  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44112  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:57:57  

Additional Information
 Earth MOID = 1.2366 au 
 Jupiter MOID = 2.19327 au 
 T_jup = 3.366 
[ 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 13.53   n/a E2021B10  
diameter diameter 5.175 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.6014 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2020) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.263   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19560 (1999 JH81)          Discovered 1999-May-14 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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