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116989 (2004 HW42)
Classification: Main-belt Asteroid          SPK-ID: 2116989
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09351201577977469 4.2231e-08  
a 3.023713204295001 2.3183e-08 au
q 2.740959687421454 1.3535e-07 au
i 6.289867049052455 6.2889e-06 deg
node 18.63475757816764 4.2445e-05 deg
peri 271.6736661021901 5.531e-05 deg
M 319.1755141578607 3.4526e-05 deg
tp 2459218.284789516967
(2021-Jan-03.78478952)
0.00018378 TDB
period 1920.477933984915
5.26
2.2087e-05
6.047e-08
d
yr
n .1874533383744818 2.1558e-09 deg/d
Q 3.306466721168548 2.5351e-08 au
  Orbit Determination Parameters
   # obs. used (total)      539  
   data-arc span      8124 days (22.24 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55549  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:21:53  

Additional Information
 Earth MOID = 1.73438 au 
 Jupiter MOID = 1.87236 au 
 T_jup = 3.230 
[ 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 14.9   n/a MPO469209  
diameter diameter 6.374 km 0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 56.595 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.057   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

116989 (2004 HW42)          Discovered 2004-Apr-20 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1917-May-30 18:23 00:03 Jupiter 1.86124447414762 1.8612439496457 1.86124499864964 3.06323077241135 2.91087870484456 2421379.266206875 3.37552234888511 66.8979941780644 21.3881696802995 -85.8089894358487 1706572.16556215 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
1964-Sep-14 11:03 00:02 Jupiter 1.8715157018026 1.871515169206 1.8715162343993 3.18830494710482 3.04304381772095 2438652.960375764 1.71183582100779 64.4966037518892 18.277743619485 -81.911987904709 2110823.83665509 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2011-Dec-30 16:04 < 00:01 Jupiter 1.88232665949105 1.88232609478303 1.88232722419907 3.31910000105779 3.1806368589336 2455926.169144967 0.23502858957178 59.4785662022081 17.6376517918835 -77.5141708341117 2264906.23843634 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2059-Apr-15 02:30 00:02 Jupiter 1.90203879367084 1.90203807843878 1.90203950890333 3.47357540997537 3.34291477436106 2473198.604230709 1.58740168019599 83.1012213005462 18.5167898507138 -76.5033074136342 1991862.07813989 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2097-May-12 05:33 00:03 Jupiter 1.99159537329896 1.99159447421349 1.99159627238444 2.76862364077195 2.61049418182486 2487105.731076809 2.94710619687824 66.5073872706057 18.2760835219855 -70.5980255078785 1694636.945665 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2106-Jul-31 06:20 00:03 Jupiter 1.92662488584254 1.92662386256317 1.92662590912449 3.63920506747117 3.51632369503649 2490471.763904614 3.16715495339336 143.938229888318 19.9797383084032 -76.7914665317931 2048521.52622568 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2144-Aug-25 09:43 00:05 Jupiter 1.97027523206157 1.97027407266088 1.97027639146215 2.6882940914866 2.52331605447461 2504376.904773973 4.61992170157347 72.7995349683054 20.4103257551674 -65.6989225233149 1470057.66429232 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2153-Nov-15 22:29 00:05 Jupiter 1.94887093552348 1.9488695132934 1.94887235776109 3.79364757336818 3.67729759064185 2507746.436893127 4.71380536105087 222.622754904594 21.2281711613659 -76.7413375561392 2184979.60324886 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21
2191-Dec-08 06:12 00:06 Jupiter 1.94774269980785 1.94774134387579 1.9477440557398 2.61675963378627 2.44493008650099 2521647.758363619 6.29704933710383 81.5406082973202 20.9634810364201 -62.0183178311692 1491911.20512309 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:21:53 2020-Nov-12 18:21

Alternate Designations
 2004 HW42 = 2000 SQ340 = 2001 YR141 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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