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118267 (1998 HR56)
Classification: Main-belt Asteroid          SPK-ID: 2118267
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 .2564810352298157 4.692e-08  
a 3.059567398022332 2.052e-08 au
q 2.274846384422171 1.4175e-07 au
i 12.51024220075752 6.0196e-06 deg
node 36.0909245517572 2.2704e-05 deg
peri 212.920333237901 2.4754e-05 deg
M 13.02373198338494 1.0283e-05 deg
tp 2458929.783393290459
(2020-Mar-21.28339329)
5.5658e-05 TDB
period 1954.737585809728
5.35
1.9666e-05
5.384e-08
d
yr
n .1841679428550375 1.8528e-09 deg/d
Q 3.844288411622493 2.5784e-08 au
  Orbit Determination Parameters
   # obs. used (total)      715  
   data-arc span      8211 days (22.48 yr)  
   first obs. used      1998-03-24  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52843  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:43  

Additional Information
 Earth MOID = 1.27292 au 
 Jupiter MOID = 1.26326 au 
 T_jup = 3.148 
[ 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 14.5   n/a MPO432686  
rotation period rot_per 8.197 h n/a LCDB (Rev. 2019-August); 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.]
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]

118267 (1998 HR56)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ 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
1952-Aug-15 19:18 00:02 Jupiter 1.28502703027623 1.28502603017577 1.28502803037852 2.90339536729301 2.66672259668382 2434240.303870004 1.77077722512697 137.721043349954 44.4451261664858 80.4460891394566 2107412.86641558 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12
2001-Aug-11 04:56 < 00:01 Jupiter 1.68514594596542 1.68514490100757 1.68514699094587 1.9543000041624 1.67750040453133 2452132.705640798 0.8559503440094 1139.09316785603 73.899179367266 -84.2943816734427 1435046.15439746 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12
2011-Mar-15 08:03 < 00:01 Jupiter 1.64832435264296 1.64832362479107 1.64832508049485 2.9969204782838 2.8202472731883 2455635.835209826 0.369363135445247 251.582630641049 35.1803116903426 -87.4737270419925 2235198.25362481 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12
2060-Feb-19 22:31 00:01 Jupiter 1.31366050009751 1.31365955123004 1.31366144896506 2.66818609477936 2.41446811479056 2473509.437950345 1.37608788737916 140.013684639485 53.1219648740652 -84.2052847328753 1813762.59612633 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12
2118-Dec-22 16:58 00:04 Jupiter 1.26728242786887 1.26728129103847 1.26728356470344 2.75457659386692 2.50018760731732 2494999.207049741 3.58795415641895 175.782216678184 45.6129332905022 81.7951370528443 2023252.8074248 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12
2168-Apr-14 05:07 00:12 Jupiter 1.87425657831289 1.87424794829919 1.87426520834907 0.798111003890735 n/a 2513009.712868985 11.9619985175738 541.626538907708 76.3537197581255 -37.8310780380911 2288167.12577243 F 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12
2177-Sep-03 02:20 00:09 Jupiter 1.4920267187718 1.49201856234894 1.49203487525437 2.90588056969269 2.70346875255968 2516438.597389853 8.75147657909777 647.81690103899 104.087722835903 55.6036910150212 1508525.85248665 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 18:12:44 2020-Nov-12 18:12

Alternate Designations
 1998 HR56 = 2003 FF20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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