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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06976901135236503 1.2881e-08  
a 3.414580257692352 1.3857e-08 au
q 3.176348368929853 4.5021e-08 au
i 1.152360003867156 1.1376e-06 deg
node 80.82463611699686 3.9357e-05 deg
peri 12.51715166626668 4.4729e-05 deg
M 327.4534882936599 1.4851e-05 deg
tp 2459604.856168199465
(2022-Jan-25.35616820)
9.5149e-05 TDB
period 2304.646999610579
6.31
1.4029e-05
3.841e-08
d
yr
n .1562061348487772 9.5089e-10 deg/d
Q 3.652812146454851 1.4824e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3694  
   data-arc span      34123 days (93.42 yr)  
   first obs. used      1928-02-26  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41672  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:20:46  

Additional Information
 Earth MOID = 2.19317 au 
 Jupiter MOID = 1.47668 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 10.90   n/a E2021B10  
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. 2020-October); 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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