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 ]  
26838 (1991 RC9)
Classification: Main-belt Asteroid          SPK-ID: 2026838
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09732731450463879 3.3148e-08  
a 2.290968709578519 7.0449e-09 au
q 2.067994877461084 7.5303e-08 au
i 4.053388892586927 3.7373e-06 deg
node 18.70655396700609 4.5718e-05 deg
peri 338.5046246905266 4.9114e-05 deg
M 105.0727268792161 1.8215e-05 deg
tp 2458630.829609901598
(2019-May-27.32960990)
6.3916e-05 TDB
period 1266.564068413351
3.47
5.8421e-06
1.599e-08
d
yr
n .2842335488412985 1.3111e-09 deg/d
Q 2.513942541695954 7.7305e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1745  
   data-arc span      10369 days (28.39 yr)  
   first obs. used      1991-09-11  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 00:52:23  

Additional Information
 Earth MOID = 1.06454 au 
 Jupiter MOID = 2.86036 au 
 T_jup = 3.589 
[ 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 14.6   n/a MPO347723  
diameter diameter 3.969 km 0.366 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.195   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26838 (1991 RC9)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RC9 = 1998 SJ159 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-15 06:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin