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689 Zita (A916 RB)
Classification: Main-belt Asteroid          SPK-ID: 2000689
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2294440312067444 8.1853e-09  
a 2.315614106763679 5.6953e-09 au
q 1.784310271388616 1.7874e-08 au
i 5.741753360093703 3.0794e-07 deg
node 168.1226561287835 7.9167e-06 deg
peri 188.516555764741 8.938e-06 deg
M 204.2364348693996 4.2113e-06 deg
tp 2459757.379312830586
(2022-Jun-26.87931283)		 1.6267e-05 TDB
period 1287.056780261295
3.52		 4.7483e-06
1.3e-08		 d
yr
n .279707939479495 1.0319e-09 deg/d
Q 2.846917942138743 7.0021e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3301  
   data-arc span      28965 days (79.30 yr)  
   first obs. used      1941-11-25  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:17:34  

Additional Information
 Earth MOID = .778484 au 
 Jupiter MOID = 2.60072 au 
 T_jup = 3.539 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.31   n/a E2021B10 IRAS observations used: 10
diameter diameter 15.621 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.425 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Higgins, D.J. (2004) Minor Planet Bull. 32, 13-14.]
[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 0.100   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.710   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=14.96 deg.
U-B UB 0.306   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=14.96 deg.
Tholen spectral type spec_T CX:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

689 Zita (A916 RB)          Discovered 1909-Sep-12 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A916 RB = A909 RA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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