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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1245280383330409 3.6764e-08  
a 3.096867523912955 1.8359e-08 AU
q 2.711220686182773 1.174e-07 AU
i 3.666940888595232 4.2004e-06 deg
node 105.4145117870995 6.8859e-05 deg
peri 153.9896506937301 7.1121e-05 deg
M 292.7913861354852 1.8378e-05 deg
tp 2457372.124900695296
(2015-Dec-15.62490070)
0.00010191 JED
period 1990.592523154881
5.45
1.7701e-05
4.846e-08
d
yr
n .1808506742652874 1.6082e-09 deg/d
Q 3.482514361643137 2.0645e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1900  
   data-arc span      34053 days (93.23 yr)  
   first obs. used      1922-02-20  
   last obs. used      2015-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52441  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:35:58  

Additional Information
 Earth MOID = 1.69805 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. 2015-July); 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) arXiv:1506.08493.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]
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 ]
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