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983 Gunila (A922 OD)
Classification: Main-belt Asteroid          SPK-ID: 2000983
[ 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 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09166745508479403 3.1438e-08  
a 3.161344367601693 1.3045e-08 au
q 2.871551974776998 1.0033e-07 au
i 14.8655295640567 3.5577e-06 deg
node 250.6912623955865 1.3625e-05 deg
peri 348.4176722467745 2.4617e-05 deg
M 244.4440152421372 2.2161e-05 deg
tp 2459859.516181944297
(2022-Oct-07.01618194)		 0.00012796 TDB
period 2053.081248860234
5.62		 1.2708e-05
3.479e-08		 d
yr
n .1753462022995211 1.0853e-09 deg/d
Q 3.451136760426388 1.4241e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3848  
   data-arc span      36022 days (98.62 yr)  
   first obs. used      1922-07-31  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35063  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:44:50  

Additional Information
 Earth MOID = 1.85867 au 
 Jupiter MOID = 1.59859 au 
 T_jup = 3.146 
[ 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 9.43   n/a E2021B10 IRAS observations used: 24
diameter diameter 73.87 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
rotation period rot_per 8.37 h n/a LCDB (Rev. 2020-October); 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:
[Hayes-Gehrke, M.N.; Berenhaus, J.; Mascone, A.; Lopez-Lahocki, M.; et al. (2014) Minor Planet Bull. 41, 77.]
geometric albedo albedo 0.0477   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
B-V BV 0.744   0.062 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=8.78, mean=8.90, max.=9.03) deg.
U-B UB 0.267   0.072 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.78 deg.
Tholen spectral type spec_T XD   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

983 Gunila (A922 OD)          Discovered 1922-Jul-30 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A922 OD = 1934 SE = 1940 TF = 1944 LA = 1949 JB = 1955 HV 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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