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891 Gunhild (A918 KB)
Classification: Main-belt Asteroid          SPK-ID: 2000891
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 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02783501606806368 3.5038e-08  
a 2.863446891698016 1.0973e-08 au
q 2.783742801457554 9.9963e-08 au
i 13.5542923572512 3.749e-06 deg
node 105.8517454889368 1.6022e-05 deg
peri 291.9283060985399 6.9802e-05 deg
M 273.6310956786434 6.9474e-05 deg
tp 2459625.106888224055
(2022-Feb-14.60688822)
0.0003426 TDB
period 1769.832336785381
4.85
1.0174e-05
2.785e-08
d
yr
n .2034090984312575 1.1693e-09 deg/d
Q 2.943150981938476 1.1279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2791  
   data-arc span      37432 days (102.48 yr)  
   first obs. used      1918-05-18  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38686  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:57  

Additional Information
 Earth MOID = 1.82324 au 
 Jupiter MOID = 2.24546 au 
 T_jup = 3.259 
[ 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 10.04   n/a E2021B10  
diameter diameter 55.747 km 0.321 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.892 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
geometric albedo albedo 0.065   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

891 Gunhild (A918 KB)          Discovered 1918-May-17 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A918 KB = 1977 FH = 1999 CF154 = A915 VE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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