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 ]  
21206 (1994 PT28)
Classification: Main-belt Asteroid          SPK-ID: 2021206
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05198745065556027 3.6296e-08  
a 2.936893977503364 1.3713e-08 au
q 2.784212346767296 1.1101e-07 au
i 2.74159284761871 3.6929e-06 deg
node 87.69773276942583 6.9969e-05 deg
peri 332.7313226940495 7.746e-05 deg
M 1.123445499766101 3.1828e-05 deg
tp 2459194.763059600871
(2020-Dec-11.26305960)
0.00016254 TDB
period 1838.361134666872
5.03
1.2876e-05
3.525e-08
d
yr
n .1958265942481619 1.3716e-09 deg/d
Q 3.089575608239433 1.4426e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1402  
   data-arc span      9655 days (26.43 yr)  
   first obs. used      1994-08-12  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52298  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:21  

Additional Information
 Earth MOID = 1.7964 au 
 Jupiter MOID = 2.08651 au 
 T_jup = 3.271 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO452469  
diameter diameter 11.001 km 0.710 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 203.833 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.]
geometric albedo albedo 0.033   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21206 (1994 PT28)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PT28 = 1999 RZ57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-13 06:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin