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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
27761 (1991 RL13)
Classification: Main-belt Asteroid          SPK-ID: 2027761
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175532005306095 5.5994e-08  
a 2.212901096347077 7.677e-09 au
q 1.824466129361218 1.233e-07 au
i 2.393564408302874 4.2479e-06 deg
node 293.8184574848378 0.00010328 deg
peri 32.05438613238623 0.0001037 deg
M 161.0994519390124 1.0678e-05 deg
tp 2458062.437165708065
(2017-Nov-04.93716571)
3.4561e-05 TDB
period 1202.379139181843
3.29
6.2569e-06
1.713e-08
d
yr
n .2994063921010484 1.558e-09 deg/d
Q 2.601336063332935 9.0245e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1011  
   data-arc span      10036 days (27.48 yr)  
   first obs. used      1991-09-13  
   last obs. used      2019-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5649  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:05:20  

Additional Information
 Earth MOID = .812206 au 
 Jupiter MOID = 2.71626 au 
 T_jup = 3.634 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.3   n/a MPO259532  
diameter diameter 2.431 km 0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27761 (1991 RL13)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RL13 = 1998 XT34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-13 11:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin