Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
100 Hekate (A868 NA)
Classification: Main-belt Asteroid          SPK-ID: 2000100
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1695552885909357 3.9297e-08  
a 3.089431762137787 1.1355e-08 au
q 2.565602268126512 1.2369e-07 au
i 6.431994780451404 4.4203e-06 deg
node 127.1816270821434 3.7595e-05 deg
peri 184.3863360475689 3.9884e-05 deg
M 319.3062917777115 1.5383e-05 deg
tp 2459224.702836976048
(2021-Jan-10.20283698)
8.5169e-05 TDB
period 1983.427533084085
5.43
1.0935e-05
2.994e-08
d
yr
n .18150398438819 1.0007e-09 deg/d
Q 3.613261256149063 1.328e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2977  
   data-arc span      54721 days (149.82 yr)  
   first obs. used      1871-01-15  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42827  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:02  

Additional Information
 Earth MOID = 1.55137 au 
 Jupiter MOID = 1.66971 au 
 T_jup = 3.193 
[ 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 7.6   n/a MPO473761 IRAS observations used: 23
diameter diameter 85.734 km 1.961 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 27.066 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Galad, A.; Vilagi, J.; Kornos, L.; Gajdos, S. (2009) Minor Planet Bull. 36, 116-118.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.205   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.838   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.98, mean=5.97, max.=11.64) deg.
U-B UB 0.363   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.98, mean=5.97, max.=11.64) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

100 Hekate (A868 NA)          Discovered 1868-Jul-11 by Watson, J. C. at Ann Arbor
Independent discovery July 18 by C. Wolf, Paris, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
1920-Jul-06 03:33 00:02 Jupiter 1.82354984319728 1.82354901214878 1.82355067424765 2.28996773511459 2.07725063480479 2422511.648030241 1.6889897204965 121.36292604499 13.5734939893218 -78.4678727136527 2414403.35771606 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
1930-May-27 07:01 00:02 Jupiter 1.71355150401932 1.71355095051935 1.71355205751909 2.0362867429426 1.77703330034844 2426123.792542786 1.55665802050286 78.1478092656929 21.863151347344 -86.7385576027245 2043547.16155541 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
1990-Nov-28 04:26 < 00:01 Jupiter 1.68967086152675 1.68967046902085 1.68967125403265 2.01731423785646 1.75127609580905 2448223.684645650 0.418111189920455 67.8146401150532 27.3362597129262 -77.1973557142419 2219452.34499301 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2000-Oct-07 04:51 < 00:01 Jupiter 1.86604443018365 1.86604400364378 1.86604485672351 2.72550582779387 2.55353779635397 2451824.701923304 0.27385017836417 50.3426164229775 12.521861111913 86.1420997879504 3124366.47769723 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2051-May-22 19:56 < 00:01 Jupiter 1.88925193616723 1.88925144186207 1.8892524304725 2.38957162678147 2.19394109586477 2470314.330771257 0.736186036784919 62.3666055712543 10.7723996707783 -77.6495735314967 2623484.6233936 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2061-Apr-18 04:13 < 00:01 Jupiter 1.69240553046587 1.69240511889027 1.69240594204137 2.02765172701741 1.76363340463585 2473932.675753062 0.967217955207796 75.4253483756385 25.252700442292 -82.9114075546144 2343217.47421567 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2121-Oct-15 15:24 00:02 Jupiter 1.73126754334465 1.7312668952436 1.73126819144836 2.08763335636707 1.83839962481837 2496027.141692777 2.0347996363233 145.534978429445 23.2836616497027 -82.9362801968536 2235298.93985932 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2131-Sep-03 12:23 00:02 Jupiter 1.81527471883693 1.81527382972918 1.81527560794505 2.48239797893409 2.28671879198279 2499637.016246289 2.32704830518878 93.0469109959988 15.5127312482979 -83.0850033807703 1975300.62028599 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2182-Apr-09 17:27 00:03 Jupiter 1.96570444678996 1.96570297025107 1.96570592333354 2.51098866469048 2.33308028072807 2518118.226836643 3.10508643126428 181.811293340143 9.25455074488656 -74.9695714830931 2548094.82259286 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51
2192-Mar-10 22:45 00:03 Jupiter 1.68729595546467 1.68729555475343 1.68729635617572 2.04859140598442 1.786820307833 2521741.447847251 3.36593603001965 145.703088427614 27.0295372288676 -87.7892814612503 2308336.136032 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:10 2020-Dec-18 01:51

Alternate Designations
 A868 NA = 1955 QA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-20 02:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin