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1302 Werra (A924 SE)
Classification: Main-belt Asteroid          SPK-ID: 2001302
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1749679302442645 1.7737e-08  
a 3.112181149740365 1.1731e-08 au
q 2.567649255425078 5.4999e-08 au
i 2.595779717941029 1.2978e-06 deg
node 90.13315606057125 1.9314e-05 deg
peri 354.293574576859 2.003e-05 deg
M 107.5604775920435 7.2738e-06 deg
tp 2458601.335671078290
(2019-Apr-27.83567108)
3.8926e-05 TDB
period 2005.375610453511
5.49
1.1339e-05
3.104e-08
d
yr
n .1795174919468512 1.015e-09 deg/d
Q 3.656713044055652 1.3784e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3282  
   data-arc span      35224 days (96.44 yr)  
   first obs. used      1924-09-28  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42356  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:16:01  

Additional Information
 Earth MOID = 1.58347 au 
 Jupiter MOID = 1.57679 au 
 T_jup = 3.193 
[ 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 11.05   n/a E2021B10  
diameter diameter 35.041 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.183 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.076   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1302 Werra (A924 SE)          Discovered 1924-Sep-28 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A924 SE = 1930 WD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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