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 ]  
2227 Otto Struve (1955 RX)
Classification: Main-belt Asteroid          SPK-ID: 2002227
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .1750702943187746 2.8636e-08  
a 2.235667116818007 5.2031e-09 au
q 1.844268216677872 6.2751e-08 au
i 4.949203375007172 3.5724e-06 deg
node 178.8710737247972 3.4777e-05 deg
peri 254.0736566110121 3.6463e-05 deg
M 75.59364884773237 1.0434e-05 deg
tp 2458744.115395088901
(2019-Sep-17.61539509)
3.5269e-05 TDB
period 1220.981645613003
3.34
4.2624e-06
1.167e-08
d
yr
n .2948447270222964 1.0293e-09 deg/d
Q 2.627066016958141 6.114e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2404  
   data-arc span      30791 days (84.30 yr)  
   first obs. used      1935-10-18  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46774  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:15:59  

Additional Information
 Earth MOID = .866142 au 
 Jupiter MOID = 2.65318 au 
 T_jup = 3.613 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456817.5 (2014-Jun-09.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743109857805366 2.8561e-08  
q 1.8461212952596 6.253e-08 au
tp 2456300.868517932961
(2013-Jan-08.36851793)
3.5594e-05 TDB
node 178.9121299897791 3.4753e-05 deg
peri 253.8955610808723 3.6468e-05 deg
i 4.949600594909345 3.574e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2404  
   data-arc span      30791 days (84.30 yr)  
   first obs. used      1935-10-18  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46774  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:15:59  

Additional Information
 Jupiter MOID = 2.65318 au 
 T_jup = 3.613 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.157259255163674E-16 -1.782167828614964E-15 -6.750163676781765E-14 -4.782062113851532E-15 -3.628073066228464E-14 -1.156077195756119E-15
q -1.782167828614964E-15 3.910017113523092E-15 1.334999934071753E-13 1.055830459485979E-14 7.710299668787984E-14 2.50258820650431E-15
tp -6.750163676781765E-14 1.334999934071753E-13 1.266964230334271E-9 -1.992035423711471E-12 3.993796257202304E-10 -1.900684517010759E-12
node -4.782062113851532E-15 1.055830459485979E-14 -1.992035423711471E-12 1.207790256201209E-9 -1.203293497405934E-9 -6.95410263359059E-12
peri -3.628073066228464E-14 7.710299668787984E-14 3.993796257202304E-10 -1.203293497405934E-9 1.329908873602355E-9 6.387478251705754E-12
i -1.156077195756119E-15 2.50258820650431E-15 -1.900684517010759E-12 -6.95410263359059E-12 6.387478251705754E-12 1.277355678253017E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4   n/a MPO452192  
diameter diameter 4.668 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.388   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2227 Otto Struve (1955 RX)          Discovered 1955-Sep-13 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1955 RX = 1935 UP = 1955 SA2 = 1962 WL2 = 1965 SV = 1970 ET2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-07 14:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin