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785 Zwetana (A914 FD)
Classification: Main-belt Asteroid          SPK-ID: 2000785
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 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2102607472196349 4.4874e-08  
a 2.569513024120954 8.9631e-09 au
q 2.029245295678699 1.1742e-07 au
i 12.77032911609044 4.3732e-06 deg
node 71.87176602888495 1.9168e-05 deg
peri 131.4634937674704 2.1034e-05 deg
M 243.4746040476701 1.1507e-05 deg
tp 2459487.459394184770
(2021-Sep-29.95939418)
4.961e-05 TDB
period 1504.43927243323
4.12
7.8718e-06
2.155e-08
d
yr
n .2392918123027644 1.2521e-09 deg/d
Q 3.10978075256321 1.0848e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2978  
   data-arc span      42085 days (115.22 yr)  
   first obs. used      1904-11-13  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3393  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:37:08  

Additional Information
 Earth MOID = 1.04737 au 
 Jupiter MOID = 1.9266 au 
 T_jup = 3.365 
[ 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 9.5   n/a MPO502160 IRAS observations used: 3
diameter diameter 49.460 km 0.973 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 8.8882 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Dotto, E.; Barucci, M.A.; Fulchignoni, M.; Di Martino, M.; et al. (1992) Astron. Astrophys. Suppl. Ser. 95, 195-211.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shepard, M.K.; Clark, B.E.; Nolan, M.C.; Howell, E.S.; et al. (2008) Icarus 195, 184-205.]
[Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Klinglesmith III, D.A.; Hendrickx, S.; Kimber, C.; Madden, K. (2017) Minor Planet Bull. 44, 244-246.]
geometric albedo albedo 0.120   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.645   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=13.90, mean=19.61, max.=26.93) deg.
U-B UB 0.166   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=13.90, mean=19.61, max.=26.93) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Cb   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)

785 Zwetana (A914 FD)          Discovered 1914-Mar-30 by Massinger, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A914 FD = 1929 YB = 1931 MC = 1953 UF1 = 1972 CD = A904 VA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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