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19486 (1998 HW122)
Classification: Main-belt Asteroid          SPK-ID: 2019486
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04533169287251148 9.1045e-09  
a 2.762825328685664 1.117e-08 au
q 2.63758177942529 2.3414e-08 au
i 9.603857193692761 2.9884e-07 deg
node 89.70532114795081 5.3651e-06 deg
peri 35.33199032195854 3.6534e-05 deg
M 107.0730652566038 3.5245e-05 deg
tp 2458897.608269728798
(2020-Feb-18.10826973)
0.00016367 TDB
period 1677.368836571676
4.59
1.0172e-05
2.785e-08
d
yr
n .2146218483084456 1.3016e-09 deg/d
Q 2.888068877946038 1.1676e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2375  
   data-arc span      14065 days (38.51 yr)  
   first obs. used      1982-12-23  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43861  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:48:38  

Additional Information
 Earth MOID = 1.66001 au 
 Jupiter MOID = 2.18892 au 
 T_jup = 3.319 
[ 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 13.34   n/a MPO614063  
diameter diameter 6.607 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 184.437 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.161   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19486 (1998 HW122)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HW122 = 1982 YE4 = 2000 UB26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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