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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09166745374375114 3.1993e-08  
a 3.161344365602071 1.3144e-08 au
q 2.871551977200175 1.0185e-07 au
i 14.86552925112825 3.6077e-06 deg
node 250.6912631741219 1.3718e-05 deg
peri 348.4176715859248 2.4666e-05 deg
M 244.4440154335854 2.2163e-05 deg
tp 2459859.516180227204
(2022-Oct-07.01618023)
0.00012797 TDB
period 2053.081246912303
5.62
1.2804e-05
3.506e-08
d
yr
n .1753462024658868 1.0936e-09 deg/d
Q 3.451136754003968 1.4349e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3744  
   data-arc span      35972 days (98.49 yr)  
   first obs. used      1922-07-31  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35446  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:29  

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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