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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 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02783499410395581 2.26e-08  
a 2.863446895102443 9.2811e-09 au
q 2.783742867660276 6.8488e-08 au
i 13.55428732848896 2.8046e-07 deg
node 105.8517475983748 3.209e-06 deg
peri 291.9282515216923 3.1634e-05 deg
M 273.6311477597634 3.3814e-05 deg
tp 2459625.106632940042
(2022-Feb-14.60663294)
0.0001669 TDB
period 1769.832339941682
4.85
8.6046e-06
2.356e-08
d
yr
n .2034090980684998 9.8894e-10 deg/d
Q 2.94315092254461 9.5394e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2837  
   data-arc span      37432 days (102.48 yr)  
   first obs. used      1918-05-18  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38676  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:35:35  

Additional Information
 Earth MOID = 1.82324 au 
 Jupiter MOID = 2.24546 au 
 T_jup = 3.259 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455865.5 (2011-Oct-31.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02940888320022788 2.2998e-08  
q 2.775521128223781 6.9419e-08 au
tp 2456129.921733335202
(2012-Jul-21.42173334)
0.00015448 TDB
node 105.9576443741345 3.2168e-06 deg
peri 300.091814050458 2.9776e-05 deg
i 13.54043342678239 2.7988e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2837  
   data-arc span      37432 days (102.48 yr)  
   first obs. used      1918-05-18  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38676  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:35:35  

Additional Information
 Jupiter MOID = 2.24546 au 
 T_jup = 3.259 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.288866760997733E-16 -1.585191400275312E-15 -3.544423995548781E-13 6.77305970324774E-16 -4.44571634478542E-14 -2.822108975117316E-15
q -1.585191400275312E-15 4.819009085374093E-15 1.354803507798111E-12 9.399094161655789E-16 1.950285416935205E-13 8.213372841300525E-15
tp -3.544423995548781E-13 1.354803507798111E-12 2.386471397724124E-8 1.429393014902356E-10 4.57235033810667E-9 -4.617622758320413E-12
node 6.77305970324774E-16 9.399094161655789E-16 1.429393014902356E-10 1.034801631984238E-11 1.864995331825416E-11 -2.792188441653081E-13
peri -4.44571634478542E-14 1.950285416935205E-13 4.57235033810667E-9 1.864995331825416E-11 8.865991629817913E-10 -8.186049610249628E-13
i -2.822108975117316E-15 8.213372841300525E-15 -4.617622758320413E-12 -2.792188441653081E-13 -8.186049610249628E-13 7.833073054136852E-14

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1929-Nov-22 05:57 < 00:01 Pallas 0.0241004527125917 0.024092393937515 0.0241085115122356 10.3575820875754 10.3575817046387 2425937.747810484 0.671318959471228 403.48770817809 25.8821352831992 -5.47337580632182 15972.7547337933 T 90 CATAB v2.0f-lin.ifort 2021-Apr-12 11:37:02 2021-Apr-12 11:37

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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