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1768 Appenzella (1965 SA)
Classification: Main-belt Asteroid          SPK-ID: 2001768
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .179095130394774 4.3984e-08  
a 2.449873007054704 8.5792e-09 au
q 2.011112681405604 1.067e-07 au
i 3.254659548969501 4.6316e-06 deg
node 12.35740998526401 5.8756e-05 deg
peri 20.14871979812851 5.9653e-05 deg
M 329.4089715093546 8.9229e-06 deg
tp 2458719.516003708902
(2019-Aug-24.01600371)
3.4682e-05 TDB
period 1400.59891573461
3.83
7.3572e-06
2.014e-08
d
yr
n .2570328992516613 1.3502e-09 deg/d
Q 2.888633332703803 1.0116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2282  
   data-arc span      28214 days (77.25 yr)  
   first obs. used      1942-09-08  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4818  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:05:29  

Additional Information
 Earth MOID = 1.0167 au 
 Jupiter MOID = 2.55003 au 
 T_jup = 3.472 
[ 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 12.6   n/a MPO502170 IRAS observations used: 2
diameter diameter 20.221 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.1839 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.032   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.615   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.52 deg.
U-B UB 0.230   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.52 deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1768 Appenzella (1965 SA)          Discovered 1965-Sep-23 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1965 SA = 1934 PM = 1942 TH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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