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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2400855883601805 3.6236e-08  
a 2.77800697769225 6.8947e-09 AU
q 2.111047537984319 1.0035e-07 AU
i 4.07754580712297 4.0435e-06 deg
node 197.2858339107828 6.7455e-05 deg
peri 174.1863911442778 6.8337e-05 deg
M 252.1802695906316 1.0589e-05 deg
tp 2457307.017163393379
(2015-Oct-11.51716339)
5.0622e-05 JED
period 1691.213455360044
4.63
6.2961e-06
1.724e-08
d
yr
n .212864910020101 7.9246e-10 deg/d
Q 3.44496641740018 8.55e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1651  
   data-arc span      54815 days (150.08 yr)  
   first obs. used      1864-01-30  
   last obs. used      2014-02-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59461  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:32:36  

Additional Information
 Earth MOID = 1.10983 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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