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 ]  
20628 (1999 TS40)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020628
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204090977420632 3.7946e-08  
a 3.991919691702235 3.4052e-08 au
q 3.112064274195371 1.5586e-07 au
i 6.546077975645519 4.0885e-06 deg
node 146.597024940509 3.9077e-05 deg
peri 278.4896066880681 4.0362e-05 deg
M 176.8322086056784 1.3047e-05 deg
tp 2457569.531772964757
(2016-Jun-30.03177296)
9.6644e-05 TDB
period 2913.205494602103
7.98
3.7276e-05
1.021e-07
d
yr
n .1235752166014537 1.5812e-09 deg/d
Q 4.8717751092091 4.1558e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1414  
   data-arc span      10583 days (28.97 yr)  
   first obs. used      1991-09-17  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53511  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:41  

Additional Information
 Earth MOID = 2.13491 au 
 Jupiter MOID = .677351 au 
 T_jup = 3.001 
[ 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 12.6   n/a MPO439237  
diameter diameter 17.936 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 68.1 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:
[Warner, B.D.; Stephens, R.D. (2018) Minor Planet Bull. 45, 262-265.]
geometric albedo albedo 0.046   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

20628 (1999 TS40)          Discovered 1999-Oct-05 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TS40 = 1991 SY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-26 13:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin