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1177 Gonnessia (1930 WA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001177
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03085868805308171 3.6876e-08  
a 3.358137896904677 1.5586e-08 au
q 3.254510167104864 1.2151e-07 au
i 15.04583349891431 4.0657e-06 deg
node 252.1347146381517 1.4448e-05 deg
peri 248.5228788904937 6.2661e-05 deg
M 138.457952673275 6.0856e-05 deg
tp 2458136.006722588129
(2018-Jan-17.50672259)
0.00037989 TDB
period 2247.740731821065
6.15
1.5648e-05
4.284e-08
d
yr
n .1601608205535061 1.115e-09 deg/d
Q 3.461765626704491 1.6067e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3501  
   data-arc span      32732 days (89.62 yr)  
   first obs. used      1930-12-18  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:29:22  

Additional Information
 Earth MOID = 2.30263 au 
 Jupiter MOID = 1.71109 au 
 T_jup = 3.100 
[ 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 9.4   n/a MPO492764  
diameter diameter 91.98 km 9.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
rotation period rot_per 30.51 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm]
[Stephens, R.D. (2011) Minor Planet Bull. 38, 115.]
[Stephens, R.D. (2011) Minor Planet Bull. 38, 165-166.]
geometric albedo albedo 0.0398   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
B-V BV 0.668   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=11.66 deg.
U-B UB 0.244   0.043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=11.66 deg.
Tholen spectral type spec_T XFU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1177 Gonnessia (1930 WA)          Discovered 1930-Nov-24 by Boyer, L. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 WA = A923 RO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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