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3446 Combes (1942 EB)
Classification: Main-belt Asteroid          SPK-ID: 2003446
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1566881993224896 3.3782e-08  
a 2.378391031671417 7.2653e-09 au
q 2.005725223634064 7.8585e-08 au
i 7.676663979698078 3.843e-06 deg
node 34.7175596882696 2.5497e-05 deg
peri 95.4290820662485 2.8288e-05 deg
M 162.896667101487 1.303e-05 deg
tp 2458394.276157979215
(2018-Oct-02.77615798)
4.7455e-05 TDB
period 1339.748608800667
3.67
6.1388e-06
1.681e-08
d
yr
n .2687071273186611 1.2312e-09 deg/d
Q 2.751056839708769 8.4037e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2357  
   data-arc span      28713 days (78.61 yr)  
   first obs. used      1942-03-12  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44215  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:13  

Additional Information
 Earth MOID = 1.0374 au 
 Jupiter MOID = 2.3238 au 
 T_jup = 3.511 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456977.5 (2014-Nov-16.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1571805346283241 3.3602e-08  
q 2.003428186991806 7.818e-08 au
tp 2457054.835086738821
(2015-Feb-01.33508674)
4.538e-05 TDB
node 34.82186165367228 2.5469e-05 deg
peri 95.08606627762636 2.8276e-05 deg
i 7.683010199731892 3.8446e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2357  
   data-arc span      28713 days (78.61 yr)  
   first obs. used      1942-03-12  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44215  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:13  

Additional Information
 Jupiter MOID = 2.3238 au 
 T_jup = 3.511 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.12910796302398E-15 -2.619979843377017E-15 6.280397391664996E-13 1.934084038482656E-15 1.772378046230617E-13 -3.346789659596956E-16
q -2.619979843377017E-15 6.112103268698318E-15 -1.425706930177162E-12 -4.19209858618576E-15 -4.039655268765696E-13 7.955761837371718E-16
tp 6.280397391664996E-13 -1.425706930177162E-12 2.059358050582153E-9 -8.744449699490299E-13 5.685207650773959E-10 2.711874158006126E-13
node 1.934084038482656E-15 -4.19209858618576E-15 -8.744449699490299E-13 6.486500523878207E-10 -6.42679182978809E-10 -3.065990137706832E-11
peri 1.772378046230617E-13 -4.039655268765696E-13 5.685207650773959E-10 -6.42679182978809E-10 7.995243769290934E-10 3.044027480297858E-11
i -3.346789659596956E-16 7.955761837371718E-16 2.711874158006126E-13 -3.065990137706832E-11 3.044027480297858E-11 1.478088493498464E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3   n/a MPO435730  
diameter diameter 8.411 km 0.246 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.6985 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Hayes-Gehrke, M.N.; Singh, A.; Malwitz, A.; Wilson, C.; et al. (2019) Minor Planet Bull. 46-4, in press.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.144   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3446 Combes (1942 EB)          Discovered 1942-Mar-12 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 EB = 1975 GL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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