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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02873565569497551 3.5091e-08  
a 2.862168104642692 1.0312e-08 au
q 2.779921827446539 1.0051e-07 au
i 13.55872369394289 3.7514e-06 deg
node 105.8546522374133 1.6015e-05 deg
peri 292.3815812995718 6.7794e-05 deg
M 232.5691224202337 6.734e-05 deg
tp 2459626.556179587330
(2022-Feb-16.05617959)
0.0003323 TDB
period 1768.646884742361
4.84
9.5583e-06
2.617e-08
d
yr
n .2035454352734979 1.1e-09 deg/d
Q 2.944414381838845 1.0608e-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 = 1.81999 au 
 Jupiter MOID = 2.24689 au 
 T_jup = 3.259 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455674.5 (2011-Apr-23.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02920242451373672 3.5817e-08  
q 2.775417929056162 1.02e-07 au
tp 2456131.756470324268
(2012-Jul-23.25647032)
0.00031177 TDB
node 105.963269923955 1.6065e-05 deg
peri 300.4710695113491 6.5359e-05 deg
i 13.54155669398333 3.7477e-06 deg
  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
 Jupiter MOID = 2.24689 au 
 T_jup = 3.259 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.28287456035255E-15 -3.635926581950909E-15 8.891576046833078E-13 -1.576781399764711E-15 1.680989347836268E-13 6.366766087982655E-17
q -3.635926581950909E-15 1.040474193286757E-14 -1.606552220228656E-12 4.6623762955778E-15 -2.971462263269529E-13 4.047659568935433E-16
tp 8.891576046833078E-13 -1.606552220228656E-12 9.719876743422512E-8 -9.020911653476906E-12 1.976834008669637E-8 -7.904464073091855E-12
node -1.576781399764711E-15 4.6623762955778E-15 -9.020911653476906E-12 2.580685271952768E-10 -2.524864851446994E-10 -8.815710268060938E-12
peri 1.680989347836268E-13 -2.971462263269529E-13 1.976834008669637E-8 -2.524864851446994E-10 4.2718253503911E-9 6.85472364809016E-12
i 6.366766087982655E-17 4.047659568935433E-16 -7.904464073091855E-12 -8.815710268060938E-12 6.85472364809016E-12 1.404488204155198E-11

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 10.0   n/a MPO347520  
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 88 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:04 2020-Dec-18 01:57

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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