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 ]  
20554 (1999 RW114)
Classification: Main-belt Asteroid          SPK-ID: 2020554
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 .09848303894196588 3.4624e-08  
a 3.046298018848222 1.9616e-08 au
q 2.746289332429159 1.0123e-07 au
i 8.026454153968009 5.0573e-06 deg
node 300.644643026825 2.7695e-05 deg
peri 303.2229411406944 4.2997e-05 deg
M 87.95318576852971 3.1685e-05 deg
tp 2458726.032922414095
(2019-Aug-30.53292241)
0.00017266 TDB
period 1942.034804520319
5.32
1.8758e-05
5.136e-08
d
yr
n .1853725788858453 1.7905e-09 deg/d
Q 3.346306705267285 2.1548e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1861  
   data-arc span      8709 days (23.84 yr)  
   first obs. used      1997-03-10  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4337  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:45  

Additional Information
 Earth MOID = 1.74154 au 
 Jupiter MOID = 1.77213 au 
 T_jup = 3.216 
[ 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 13.61   n/a E2021B10  
diameter diameter 7.223 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.35367 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.]
geometric albedo albedo 0.162   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20554 (1999 RW114)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RW114 = 1997 EV40 
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 11:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin