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JPL Small-Body Database Browser
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108177 (2001 HW12)
Classification: Main-belt Asteroid          SPK-ID: 2108177
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1261681075905277 3.5035e-08  
a 2.279053558434422 8.7404e-09 au
q 1.991509683869293 7.973e-08 au
i 1.811228187600347 6.0631e-06 deg
node 171.1786036248988 0.00013107 deg
peri 91.88813182011903 0.00013396 deg
M 164.6183363357384 3.0144e-05 deg
tp 2458425.846665046334
(2018-Nov-03.34666505)
0.00010396 TDB
period 1256.695974386465
3.44
7.2294e-06
1.979e-08
d
yr
n .2864654676527922 1.6479e-09 deg/d
Q 2.566597432999551 9.8432e-09 au
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      8323 days (22.79 yr)  
   first obs. used      1997-01-17  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57759  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 10:07:54  

Additional Information
 Earth MOID = .976879 au 
 Jupiter MOID = 2.48916 au 
 T_jup = 3.596 
[ 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 16.4   n/a MPO502749  
rotation period rot_per 10.349 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

108177 (2001 HW12)          Discovered 2001-Apr-18 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
2040-Mar-15 16:05 < 00:01 Juno 0.043625651300667 0.0436209410024719 0.0436303618679659 7.79611786953394 7.79611783376339 2466229.170395112 0.218916963770794 291.493502694364 34.7163535463009 36.6354776374574 113574.56825298 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2070-Nov-09 11:41 < 00:01 Hebe 0.0471624089384573 0.0471562136608745 0.0471686065914953 7.5538935735537 7.55389355610389 2477424.986607326 0.762769712042263 614.336250350326 34.284519506886 -59.962202295265 178209.732341264 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2106-Dec-29 04:26 < 00:01 Eunom 0.0367078839193985 0.0366935937139415 0.0367221750613825 6.66017306279495 6.66017300537683 2490622.684867246 0.288235549031422 770.22367447749 43.5943447604307 22.3857628581669 48403.1022961957 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2124-Mar-10 02:43 < 00:01 Eunom 0.0227955983993487 0.0227791971109816 0.0228120023837032 6.56768613816865 6.56768604440586 2496903.613525561 0.304390581115061 906.467034366315 43.2311306074125 25.6085940298323 34246.9781726424 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2141-May-20 18:46 < 00:01 Eunom 0.0155542093163458 0.0155401782535021 0.0155682558020029 6.4785771411716 6.47857700186673 2503184.282001069 0.336883687686367 1043.08700108235 42.9707195775962 47.9181652902034 40198.7897535073 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2158-Aug-01 02:45 < 00:01 Eunom 0.0107960518081757 0.0107791397616733 0.010812988747478 6.372456741561 6.37245653751784 2509465.614763302 0.474722000633439 1175.19421221838 42.5989653332083 -44.1598104583695 26417.4441804236 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2175-Oct-13 11:39 < 00:01 Eunom 0.00853313181364403 0.00850721165544901 0.00855905449251217 6.3614316588988 6.36143140029758 2515747.985338318 0.608564618493932 1312.59427449406 42.3828698299851 -10.1525601783134 5389.56679482968 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
2192-Dec-22 23:37 < 00:01 Eunom 0.0260174183790489 0.0259884151263127 0.0260464216809236 6.25018897555736 6.25018888923237 2522028.484115574 0.829251543719565 1446.7065886559 41.990020341332 -2.20291754334312 4459.10730098019 T 15 CATAB v2.0f-lin.ifort 2019-Dec-04 10:08:07 2019-Dec-04 10:08
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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