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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2101259225608795 1.4597e-08  
a 2.56982421125022 6.8246e-09 au
q 2.029837528041983 3.9052e-08 au
i 12.76893485451264 7.9789e-07 deg
node 71.87006731939891 4.4394e-06 deg
peri 131.4352270689147 6.8004e-06 deg
M 291.3468737446335 7.1862e-06 deg
tp 2459487.453396265925
(2021-Sep-29.95339627)
3.065e-05 TDB
period 1504.712578877763
4.12
5.994e-06
1.641e-08
d
yr
n .2392483488564264 9.5305e-10 deg/d
Q 3.109810894458457 8.2587e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3604  
   data-arc span      42495 days (116.34 yr)  
   first obs. used      1904-11-13  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32218  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:52:30  

Additional Information
 Earth MOID = 1.04705 au 
 Jupiter MOID = 1.92547 au 
 T_jup = 3.365 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456806.5 (2014-May-29.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2101735491277441 1.4606e-08  
q 2.029676800463337 3.9081e-08 au
tp 2456479.609621512475
(2013-Jul-06.10962151)
2.6066e-05 TDB
node 71.89898018459417 4.4411e-06 deg
peri 131.564015047506 6.8059e-06 deg
i 12.76643063279268 7.977e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3604  
   data-arc span      42495 days (116.34 yr)  
   first obs. used      1904-11-13  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32218  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:52:30  

Additional Information
 Jupiter MOID = 1.92547 au 
 T_jup = 3.365 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.133420425096265E-16 -5.656366113072903E-16 3.806851938176488E-14 2.733346723947922E-14 -2.357591353190236E-14 -8.133904310119781E-15
q -5.656366113072903E-16 1.527312464178647E-15 -7.186774100407988E-14 -7.250290409826171E-14 6.988928770130633E-14 2.163159483870199E-14
tp 3.806851938176488E-14 -7.186774100407988E-14 6.794593341018427E-10 -1.43499615899525E-11 1.363794673636784E-10 5.034578838795345E-12
node 2.733346723947922E-14 -7.250290409826171E-14 -1.43499615899525E-11 1.972364924908838E-11 -2.16609932604996E-11 -1.184389453456839E-12
peri -2.357591353190236E-14 6.988928770130633E-14 1.363794673636784E-10 -2.16609932604996E-11 4.632012989382358E-11 1.913510500610876E-12
i -8.133904310119781E-15 2.163159483870199E-14 5.034578838795345E-12 -1.184389453456839E-12 1.913510500610876E-12 6.363312768943971E-13

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. 2020-October); 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.]
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

[ show close-approach data ]
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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