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1010 Marlene (A923 VH)
Classification: Main-belt Asteroid          SPK-ID: 2001010
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1043444838840045 2.1298e-08  
a 2.930571333454278 8.9077e-09 au
q 2.624782380179732 6.2239e-08 au
i 3.906923465687718 2.5945e-07 deg
node 98.7367645882296 1.4006e-05 deg
peri 279.62203550 1.6401e-05 deg
M 180.1982268302789 9.9555e-06 deg
tp 2460311.704911355233
(2024-Jan-02.20491136)
5.2774e-05 TDB
period 1832.427802460446
5.02
8.3547e-06
2.287e-08
d
yr
n .1964606733845771 8.9574e-10 deg/d
Q 3.236360286728823 9.8372e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3901  
   data-arc span      42976 days (117.66 yr)  
   first obs. used      1903-10-27  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39599  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:50:42  

Additional Information
 Earth MOID = 1.62956 au 
 Jupiter MOID = 2.22908 au 
 T_jup = 3.265 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456649.5 (2013-Dec-23.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1004939478476121 2.0895e-08  
q 2.636514256657391 6.0715e-08 au
tp 2456636.320234803311
(2013-Dec-09.82023480)
4.8555e-05 TDB
node 98.92140479915481 1.3968e-05 deg
peri 277.95015051051 1.6609e-05 deg
i 3.911123044938538 2.6048e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3901  
   data-arc span      42976 days (117.66 yr)  
   first obs. used      1903-10-27  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39599  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:50:42  

Additional Information
 Jupiter MOID = 2.22908 au 
 T_jup = 3.265 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.366093169278986E-16 -1.257622194089117E-15 7.312819526341783E-13 1.014796776094404E-14 9.393300417596161E-14 -1.724328905081995E-16
q -1.257622194089117E-15 3.686262786991518E-15 -2.029743263295083E-12 -3.363652030601975E-14 -2.489433293193731E-13 4.230156836815558E-16
tp 7.312819526341783E-13 -2.029743263295083E-12 2.357592844630159E-9 -5.881840848064623E-11 4.389792803620971E-10 6.095604967381672E-13
node 1.014796776094404E-14 -3.363652030601975E-14 -5.881840848064623E-11 1.951185703744536E-10 -2.040719397019628E-10 2.873678310994424E-12
peri 9.393300417596161E-14 -2.489433293193731E-13 4.389792803620971E-10 -2.040719397019628E-10 2.758654183686643E-10 -2.669321215446353E-12
i -1.724328905081995E-16 4.230156836815558E-16 6.095604967381672E-13 2.873678310994424E-12 -2.669321215446353E-12 6.78510197054443E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.72   n/a E2021B10  
diameter diameter 46.876 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 31.06 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:
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.047   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1010 Marlene (A923 VH)          Discovered 1923-Nov-12 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A923 VH = 1937 NB1 = 1950 CJ = 1950 EY = A903 UD = A908 VA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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