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 ]  
11885 Summanus (1990 SS)
Classification: Apollo [NEO]          SPK-ID: 2011885
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .474902212558776 3.8222e-08  
a 1.703268930647554 2.0658e-09 au
q .8943827469004103 6.5038e-08 au
i 19.4178968436447 1.5768e-05 deg
node 359.8579296603603 1.0463e-05 deg
peri 116.0804172080474 1.5872e-05 deg
M 70.10902977164258 7.3616e-06 deg
tp 2458842.377118524275
(2019-Dec-24.87711852)		 1.6413e-05 TDB
period 811.9387405113617
2.22		 1.4771e-06
4.044e-09		 d
yr
n .443383203729472 8.0661e-10 deg/d
Q 2.512155114394699 3.0468e-09 au
   Orbit Determination Parameters
   # obs. used (total)      322  
   data-arc span      10827 days (29.64 yr)  
   first obs. used      1990-09-25  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45945  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-27 05:59:12  

Additional Information
 Earth MOID = .0670826 au 
 Jupiter MOID = 2.76277 au 
 T_jup = 4.005 
[ 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 18.5   n/a MPO196501  
diameter diameter 1.298 km 0.446 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2012ApJ...760L..12M)  
rotation period rot_per 7.368 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
geometric albedo albedo 0.033   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2012ApJ...760L..12M)  

11885 Summanus           Discovered 1990 Sept. 25 by Spacewatch at Kitt Peak.
Summanus was the Etruscan or Roman deity responsible for nocturnal lightning and thunder, as Jupiter was in daytime. This was the first earth-approacher discovered automatically by software and (lightning-fast) electronic computer; J. V. Scotti used D. L. Rabinowitz's Moving Object Detection Program at the telescope.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100923/MPCPages.arcLast Updated: 2010-12-06

[ 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 2021-Jan-21 16:02 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin