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55946 (1998 HP24)
Classification: Main-belt Asteroid          SPK-ID: 2055946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2027237854095257 3.9267e-08  
a 3.172575574647598 2.5877e-08 au
q 2.529419044657236 1.2858e-07 au
i 17.77118150019335 4.9285e-06 deg
node 66.402564090 1.4857e-05 deg
peri 259.7363920608549 2.0744e-05 deg
M 242.8170660673012 1.8668e-05 deg
tp 2459672.359183633007
(2022-Apr-02.85918363)
0.00011195 TDB
period 2064.031834591155
5.65
2.5253e-05
6.914e-08
d
yr
n .1744159145061389 2.1339e-09 deg/d
Q 3.81573210463796 3.1123e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1618  
   data-arc span      8119 days (22.23 yr)  
   first obs. used      1998-04-22  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49291  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:01:35  

Additional Information
 Earth MOID = 1.59116 au 
 Jupiter MOID = 1.78468 au 
 T_jup = 3.096 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO395525  
diameter diameter 16.005 km 0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 37.0183 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.049   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

55946 (1998 HP24)          Discovered 1998-Apr-22 by Visnjan at Visnjan
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HP24 = 2000 RS61 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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