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 ]  
277397 (2005 UN156)
Classification: Main-belt Asteroid          SPK-ID: 2277397
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1395484588487842 5.2008e-08  
a 2.521945373455512 2.3785e-08 au
q 2.170011783288974 1.3176e-07 au
i 2.337363692429247 8.2088e-06 deg
node 33.00803216137297 0.00013978 deg
peri 280.5096335419262 0.00014379 deg
M 199.9950033791617 3.4842e-05 deg
tp 2459250.679068639984
(2021-Feb-05.17906864)
0.00014399 TDB
period 1462.857221047001
4.01
2.0695e-05
5.666e-08
d
yr
n .2460937368462656 3.4814e-09 deg/d
Q 2.873878963622051 2.7104e-08 au
  Orbit Determination Parameters
   # obs. used (total)      185  
   data-arc span      7745 days (21.20 yr)  
   first obs. used      1997-11-25  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62915  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 05:18:12  

Additional Information
 Earth MOID = 1.15672 au 
 Jupiter MOID = 2.3831 au 
 T_jup = 3.441 
[ 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 17.1   n/a MPO427523  

277397 (2005 UN156)          Discovered 2005-Oct-28 by Healy, D. at Junk Bond
Reference: 20110517/Numbers.arcLast Updated: 2011-05-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-10 19:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin