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74 Galatea
Classification: Main-belt Asteroid          SPK-ID: 2000074
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2398278291066949 2.9541e-08  
a 2.778009468308543 6.717e-09 au
q 2.111765488286261 8.1722e-08 au
i 4.077714331837639 3.4394e-06 deg
node 197.2716306908255 5.4223e-05 deg
peri 174.1393629274287 5.4776e-05 deg
M 19.92129379993114 7.8269e-06 deg
tp 2457306.913318246550
(2015-Oct-11.41331825)
3.6624e-05 JED
period 1691.215729741336
4.63
6.1338e-06
1.679e-08
d
yr
n .212864623755043 7.7204e-10 deg/d
Q 3.444253448330825 8.3279e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1876  
   data-arc span      55469 days (151.87 yr)  
   first obs. used      1864-01-30  
   last obs. used      2015-12-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5834  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:30:55  

Additional Information
 Earth MOID = 1.11015 au 
 Jupiter MOID = 2.01678 au 
 T_jup = 3.288 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.66 mag 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. 2015-December); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2008) Minor Planet Bul. 35, 135-138.]
[Pilcher, F. (2009) Minor Planet Bul. 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 .686 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=2.33, mean=4.63, max.=6.93) deg.
U-B UB .320 mag .088 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 | Physical Parameters | Discovery Circumstances ]
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