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1091 Spiraea (1928 DT)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001091
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06941190738525596 3.3148e-08  
a 3.414007684820787 1.7156e-08 au
q 3.177034899589454 1.1497e-07 au
i 1.152365541576596 3.6745e-06 deg
node 80.82485239551282 0.00018103 deg
peri 12.53429690114529 0.00018285 deg
M 265.534011657341 2.6521e-05 deg
tp 2459605.099996527642
(2022-Jan-25.59999653)
0.00017108 TDB
period 2304.067342845571
6.31
1.7367e-05
4.755e-08
d
yr
n .1562454331544809 1.1777e-09 deg/d
Q 3.650980470052119 1.8346e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3131  
   data-arc span      33535 days (91.81 yr)  
   first obs. used      1928-02-26  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:45:34  

Additional Information
 Earth MOID = 2.19376 au 
 Jupiter MOID = 1.47855 au 
 T_jup = 3.140 
[ 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 10.8   n/a MPO267711  
diameter diameter 35.178 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.01 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.091   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1091 Spiraea (1928 DT)          Discovered 1928-Feb-26 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1928 DT = 1934 CN1 = 1938 UR = 1964 XH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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