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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
21475 Jasonclain (1998 HQ100)
Classification: Main-belt Asteroid          SPK-ID: 2021475
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04188935105136362 2.4839e-08  
a 2.182341700383706 5.8712e-09 au
q 2.090924822782303 5.4267e-08 au
i 2.599771609988336 2.7896e-06 deg
node 85.5008086946456 8.5615e-05 deg
peri 173.5556135040875 0.00010029 deg
M 270.3026245620737 5.3098e-05 deg
tp 2459293.899783280421
(2021-Mar-20.39978328)
0.0001738 TDB
period 1177.558668414404
3.22
4.7521e-06
1.301e-08
d
yr
n .3057172518501724 1.2337e-09 deg/d
Q 2.273758577985109 6.1172e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2071  
   data-arc span      24876 days (68.11 yr)  
   first obs. used      1951-12-27  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50719  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:25:03  

Additional Information
 Earth MOID = 1.07553 au 
 Jupiter MOID = 2.72489 au 
 T_jup = 3.677 
[ 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 14.6   n/a MPO452473  
diameter diameter 4.086 km 0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.27240 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.127   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21475 Jasonclain           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Jason Bernard Clain (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his medicine and health project. He attends the Greenwich High School, Greenwich, Connecticut, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ 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
1970-Jun-26 01:28 < 00:01 Juno 0.0373210599862309 0.0373181121463759 0.0373240078984843 7.16506301154539 7.16506296604952 2440763.560938186 0.211890616135566 168.964199974034 27.1157691637645 29.9975079839105 106809.632335968 T 33 CATAB v2.0f-lin.ifort 2020-Feb-22 23:25:19 2020-Feb-22 23:25
2044-Aug-22 05:42 < 00:01 Juno 0.0324159453511273 0.0324125861959424 0.0324193045089378 7.1608217984229 7.16082174601166 2467849.737633760 0.203246929947845 168.110274850222 27.3289241867595 5.11013313924917 32779.7532565607 T 33 CATAB v2.0f-lin.ifort 2020-Feb-22 23:25:19 2020-Feb-22 23:25
2118-Oct-17 16:29 < 00:01 Juno 0.0368955145647133 0.0368857015086154 0.0369053276212077 7.25017248057694 7.25017243509656 2494933.186894373 0.288857611761234 489.249444500471 27.5287566489262 0.792758336232991 11612.0792911809 T 33 CATAB v2.0f-lin.ifort 2020-Feb-22 23:25:19 2020-Feb-22 23:25

Alternate Designations
 1998 HQ100 = 3164 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-08 22:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin