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 ]  
20238 (1998 DT7)
Classification: Main-belt Asteroid          SPK-ID: 2020238
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1516208104055198 3.0387e-08  
a 2.281983640513569 6.6732e-09 au
q 1.935987431606763 6.8972e-08 au
i 3.841510612120226 2.6485e-06 deg
node 300.8863783089772 5.527e-05 deg
peri 296.9819216914735 5.621e-05 deg
M 149.5033700285658 1.0611e-05 deg
tp 2458677.603543835959
(2019-Jul-13.10354384)
3.7049e-05 TDB
period 1259.120273898087
3.45
5.523e-06
1.512e-08
d
yr
n .2859139094675067 1.2541e-09 deg/d
Q 2.627979849420375 7.6849e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2332  
   data-arc span      10389 days (28.44 yr)  
   first obs. used      1992-08-06  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .457  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:15:52  

Additional Information
 Earth MOID = .926124 au 
 Jupiter MOID = 2.39107 au 
 T_jup = 3.586 
[ 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 14.42   n/a E2021B10  
rotation period rot_per 5.85289 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

20238 (1998 DT7)          Discovered 1998-Feb-23 by JPL/GEODSS NEAT at Haleakala
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 DT7 = 1999 RF154 
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-21 15:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin