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74 Galatea (A862 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000074
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2359739509994207 1.5544e-08  
a 2.780836740081632 4.8986e-09 au
q 2.124631707440221 4.3158e-08 au
i 4.070422623570091 5.9364e-07 deg
node 197.1413835749354 3.1638e-06 deg
peri 174.5704041537783 5.6146e-06 deg
M 42.18097256240711 2.6702e-06 deg
tp 2459002.038735527152
(2020-Jun-01.53873553)
1.25e-05 TDB
period 1693.798195490167
4.64
4.4755e-06
1.225e-08
d
yr
n .2125400776541859 5.616e-10 deg/d
Q 3.437041772723044 6.0545e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3471  
   data-arc span      57397 days (157.14 yr)  
   first obs. used      1864-01-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48005  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:48:59  

Additional Information
 Earth MOID = 1.1234 au 
 Jupiter MOID = 2.03096 au 
 T_jup = 3.288 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457238.5 (2015-Aug-04.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2399386397573456 1.5712e-08  
q 2.111776350886296 4.384e-08 au
tp 2457306.935323548489
(2015-Oct-11.43532355)
1.2148e-05 TDB
node 197.2714746682148 3.1513e-06 deg
peri 174.1470098526068 5.5009e-06 deg
i 4.07744476738259 5.9534e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3471  
   data-arc span      57397 days (157.14 yr)  
   first obs. used      1864-01-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48005  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:48:59  

Additional Information
 Jupiter MOID = 2.03096 au 
 T_jup = 3.288 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.468641479149979E-16 -6.863404273315872E-16 6.740308950542155E-14 5.96113901827946E-15 1.686196456018227E-14 -4.561986733403033E-15
q -6.863404273315872E-16 1.921969892834031E-15 -1.995108644122268E-13 -1.64800465399941E-14 -5.147083190550845E-14 1.25408878238463E-14
tp 6.740308950542155E-14 -1.995108644122268E-13 1.475662873402406E-10 -8.764612418875261E-12 5.654488928254809E-11 7.26748690365969E-13
node 5.96113901827946E-15 -1.64800465399941E-14 -8.764612418875261E-12 9.930548533989392E-12 -1.205056694952653E-11 -5.804074498639694E-13
peri 1.686196456018227E-14 -5.147083190550845E-14 5.654488928254809E-11 -1.205056694952653E-11 3.025974848820374E-11 8.751433609366514E-13
i -4.561986733403033E-15 1.25408878238463E-14 7.26748690365969E-13 -5.804074498639694E-13 8.751433609366514E-13 3.5442792623032E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.76   n/a MPCxxxxx 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. 2020-October); 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 (A862 QA)          Discovered 1862-Aug-29 by Tempel, E. W. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A862 QA = A908 OC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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