Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
994 Otthild (A923 FB)
Classification: Main-belt Asteroid          SPK-ID: 2000994
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165763102378791 4.4948e-08  
a 2.52896591925312 7.9463e-09 au
q 2.234148403669245 1.1482e-07 au
i 15.41188991332918 5.0083e-06 deg
node 2.347783245986778 1.35e-05 deg
peri 342.4278469418163 2.1605e-05 deg
M 254.3261870207102 1.7731e-05 deg
tp 2459431.699024224071
(2021-Aug-05.19902422)
7.3013e-05 TDB
period 1468.969883305794
4.02
6.9235e-06
1.896e-08
d
yr
n .2450696941382148 1.1551e-09 deg/d
Q 2.823783434836995 8.8726e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2891  
   data-arc span      35571 days (97.39 yr)  
   first obs. used      1923-03-18  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:26:11  

Additional Information
 Earth MOID = 1.23235 au 
 Jupiter MOID = 2.61579 au 
 T_jup = 3.393 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456359.5 (2013-Mar-08.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1151914125277085 4.4616e-08  
q 2.238479424575819 1.1373e-07 au
tp 2456489.465776166138
(2013-Jul-15.96577617)
7.0815e-05 TDB
node 2.432914089758808 1.3525e-05 deg
peri 341.647297862216 2.1849e-05 deg
i 15.39472790472001 5.0026e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2891  
   data-arc span      35571 days (97.39 yr)  
   first obs. used      1923-03-18  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:26:11  

Additional Information
 Jupiter MOID = 2.61579 au 
 T_jup = 3.393 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.990578703710314E-15 -5.064345852350599E-15 9.283629408968957E-13 5.188285831244606E-15 1.995270543795412E-13 6.374979055385987E-15
q -5.064345852350599E-15 1.293426484201287E-14 -2.254109660684529E-12 -1.320722570759071E-14 -4.847415538665496E-13 -1.60170103873035E-14
tp 9.283629408968957E-13 -2.254109660684529E-12 5.014773324726608E-9 -9.741662808834506E-12 1.224325620098921E-9 3.225422117706644E-12
node 5.188285831244606E-15 -1.320722570759071E-14 -9.741662808834506E-12 1.829232382138075E-10 -1.782619237964087E-10 4.048444302216106E-12
peri 1.995270543795412E-13 -4.847415538665496E-13 1.224325620098921E-9 -1.782619237964087E-10 4.773825196761474E-10 -3.313408929630884E-12
i 6.374979055385987E-15 -1.60170103873035E-14 3.225422117706644E-12 4.048444302216106E-12 -3.313408929630884E-12 2.502557618455337E-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 10.2   n/a MPO473776 IRAS observations used: 4
diameter diameter 20.786 km 1.371 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.95 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.310   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.860   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.74 deg.
U-B UB 0.420   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.74 deg.
SMASSII spectral type spec_B S   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)

994 Otthild (A923 FB)          Discovered 1923-Mar-18 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A923 FB = 1960 KC = 1967 CM = 1967 EK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-29 12:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin