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 ]  
18613 (1998 DR)
Classification: Main-belt Asteroid          SPK-ID: 2018613
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675247050215957 3.768e-08  
a 2.750157211345746 1.2965e-08 au
q 2.289437935752035 1.0448e-07 au
i 6.276820545655519 3.5208e-06 deg
node 101.2325646855114 3.8837e-05 deg
peri 219.8356353422712 4.0407e-05 deg
M 197.2037549043739 1.2053e-05 deg
tp 2459953.814957860064
(2023-Jan-09.31495786)
5.6564e-05 TDB
period 1665.845454054082
4.56
1.178e-05
3.225e-08
d
yr
n .2161064816210211 1.5282e-09 deg/d
Q 3.210876486939456 1.5137e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1739  
   data-arc span      10276 days (28.13 yr)  
   first obs. used      1993-01-25  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47718  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:20  

Additional Information
 Earth MOID = 1.27867 au 
 Jupiter MOID = 2.10121 au 
 T_jup = 3.317 
[ 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 14.68   n/a E2021B10  
rotation period rot_per 34.3478 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:
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

18613 (1998 DR)          Discovered 1998-Feb-19 by Klet at Klet
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 DR = 1999 JF50 
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-23 13:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin