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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21078 (1991 RR16)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021078
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08875237341120705 4.4916e-08  
a 3.394719110174021 2.6813e-08 au
q 3.093429732081696 1.5946e-07 au
i 8.077975951162689 6.2177e-06 deg
node 23.47018693777654 3.2368e-05 deg
peri 282.7000153800696 5.0372e-05 deg
M 317.4500543367058 4.1739e-05 deg
tp 2459666.522966230453
(2022-Mar-28.02296623)
0.00026601 TDB
period 2284.568554145535
6.25
2.7067e-05
7.411e-08
d
yr
n .1575789876590706 1.8669e-09 deg/d
Q 3.696008488266346 2.9192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      13077 days (35.80 yr)  
   first obs. used      1985-10-18  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:40:16  

Additional Information
 Earth MOID = 2.09221 au 
 Jupiter MOID = 1.58694 au 
 T_jup = 3.126 
[ 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 12.69   n/a MPO636381  
diameter diameter 14.807 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21078 (1991 RR16)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RR16 = 1985 UC6 = 1998 WF20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-25 20:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin