Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
1684 Iguassu (1951 QE)
Classification: Main-belt Asteroid          SPK-ID: 2001684
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247902208844663 3.6456e-08  
a 3.097183085515796 1.7709e-08 au
q 2.710684924154647 1.1672e-07 au
i 3.666690048573983 4.1392e-06 deg
node 105.412135843712 6.8242e-05 deg
peri 154.1571741420286 7.045e-05 deg
M 41.17079053146472 1.7922e-05 deg
tp 2457372.814459810764
(2015-Dec-16.31445981)
9.8993e-05 JED
period 1990.896784104305
5.45
1.7075e-05
4.675e-08
d
yr
n .1808230355658353 1.5509e-09 deg/d
Q 3.483681246876945 1.9919e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1950  
   data-arc span      34376 days (94.12 yr)  
   first obs. used      1922-02-20  
   last obs. used      2016-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52718  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:35:29  

Additional Information
 Earth MOID = 1.69578 au 
 Jupiter MOID = 1.57404 au 
 T_jup = 3.208 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.9 mag n/a MPO256874  
diameter diameter 26.53 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
rotation period rot_per 9.1423 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]
geometric albedo albedo 0.1202   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7

1684 Iguassu (1951 QE)          Discovered 1951-Aug-23 by Itzigsohn, M. at La Plata
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1951 QE = 1934 LN = 1935 SK1 = 1939 HK = 1949 DE = 1950 JT = 1965 AA1 = A922 DA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-06 09:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin