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JPL Small-Body Database Browser
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74 Galatea
Classification: Main-belt Asteroid          SPK-ID: 2000074
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2364369024460758 2.7972e-08  
a 2.783093828404418 7.3233e-09 au
q 2.125067744399687 7.7289e-08 au
i 4.070962452070505 3.1953e-06 deg
node 197.1968513051811 5.2778e-05 deg
peri 174.3052069112577 5.334e-05 deg
M 274.9099461214046 9.2862e-06 deg
tp 2459001.335794682416
(2020-May-31.83579468)
4.456e-05 TDB
period 1695.86079110439
4.64
6.6936e-06
1.833e-08
d
yr
n .212281575167239 8.3789e-10 deg/d
Q 3.44111991240915 9.0548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3006  
   data-arc span      56887 days (155.75 yr)  
   first obs. used      1864-01-30  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4946  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:49:03  

Additional Information
 Earth MOID = 1.12443 au 
 Jupiter MOID = 2.02257 au 
 T_jup = 3.287 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.66   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
diameter diameter 118.71 km 2.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 17.268 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2008) Minor Planet Bull. 35, 135-138.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 133-136.]
geometric albedo albedo 0.0431   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV 0.686   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.33, mean=4.63, max.=6.93) deg.
U-B UB 0.320   0.088 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.33, mean=4.63, max.=6.93) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B C   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)

74 Galatea          Discovered 1862-Aug-29 by Tempel, E. W. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A908 OC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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