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2605 Sahade (1974 QA)
Classification: Main-belt Asteroid          SPK-ID: 2002605
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0777950490510563 1.6576e-08  
a 3.09316790190568 1.505e-08 au
q 2.852534753253774 5.5291e-08 au
i 9.428851138727595 1.3547e-06 deg
node 171.7981051394683 4.5505e-06 deg
peri 182.0672891419346 1.702e-05 deg
M 201.2125342625087 1.9253e-05 deg
tp 2460272.930304255102
(2023-Nov-24.43030425)
0.00010864 TDB
period 1987.026545618208
5.44
1.4502e-05
3.97e-08
d
yr
n .1811752343187725 1.3223e-09 deg/d
Q 3.333801050557585 1.6221e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2443  
   data-arc span      26004 days (71.20 yr)  
   first obs. used      1950-04-17  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 21:48:50  

Additional Information
 Earth MOID = 1.84647 au 
 Jupiter MOID = 2.09046 au 
 T_jup = 3.199 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456923.5 (2014-Sep-23.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07380138218226778 1.6294e-08  
q 2.869601448253116 5.4176e-08 au
tp 2456283.650404558614
(2012-Dec-22.15040456)
0.0001064 TDB
node 171.9122415818002 4.5697e-06 deg
peri 180.0269486814122 1.7943e-05 deg
i 9.399196698751998 1.3503e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2443  
   data-arc span      26004 days (71.20 yr)  
   first obs. used      1950-04-17  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 21:48:50  

Additional Information
 Jupiter MOID = 2.09046 au 
 T_jup = 3.199 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.654916196504265E-16 -8.53620909277838E-16 1.977266866251086E-13 7.638285757537975E-15 2.354340113826566E-14 1.140607421702244E-14
q -8.53620909277838E-16 2.935034639381561E-15 -4.076897762058409E-13 -2.410326003657386E-14 -2.369386037334677E-14 -3.493597618660187E-14
tp 1.977266866251086E-13 -4.076897762058409E-13 1.132121293739905E-8 -1.780755559869979E-12 1.847258706004505E-9 -6.176119191017056E-12
node 7.638285757537975E-15 -2.410326003657386E-14 -1.780755559869979E-12 2.088255622948939E-11 -1.996687863845283E-11 -5.995115798628703E-14
peri 2.354340113826566E-14 -2.369386037334677E-14 1.847258706004505E-9 -1.996687863845283E-11 3.219681504832355E-10 -5.616829320059332E-13
i 1.140607421702244E-14 -3.493597618660187E-14 -6.176119191017056E-12 -5.995115798628703E-14 -5.616829320059332E-13 1.823343552315714E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.49   n/a E2021B10  
diameter diameter 11.802 km 0.463 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.84064 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.105   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2605 Sahade (1974 QA)          Discovered 1974-Aug-16 by Felix Aguilar Observatory at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1974 QA = 1979 NC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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