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 ]  
21540 Itthipanyanan (1998 QE11)
Classification: Main-belt Asteroid          SPK-ID: 2021540
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1102431755714892 7.0695e-08  
a 3.168343935534319 3.0236e-08 au
q 2.819055638778345 2.3503e-07 au
i 22.07282340176851 8.3433e-06 deg
node 329.5904044145902 1.2152e-05 deg
peri 342.1565770669303 2.8735e-05 deg
M 352.4666410900526 2.679e-05 deg
tp 2459243.605537480118
(2021-Jan-29.10553748)
0.00015336 TDB
period 2059.903647010892
5.64
2.9487e-05
8.073e-08
d
yr
n .1747654559097425 2.5017e-09 deg/d
Q 3.517632232290292 3.3569e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1027  
   data-arc span      14282 days (39.10 yr)  
   first obs. used      1981-08-05  
   last obs. used      2020-09-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49316  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:47:44  

Additional Information
 Earth MOID = 1.81028 au 
 Jupiter MOID = 1.8524 au 
 T_jup = 3.080 
[ 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 13.4   n/a MPO347689  
diameter diameter 12.263 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.289 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.068   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21540 Itthipanyanan           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Suksun Itthipanyanan (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his botany team project. He attends the Triam Udom Suksa School, Bangkok, Thailand.
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

[ show close-approach data ]
Alternate Designations
 1998 QE11 = 1981 PV = 1999 UY10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-16 12:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin