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824 Anastasia (A916 FF)
Classification: Main-belt Asteroid          SPK-ID: 2000824
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 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1375054953823537 1.5055e-08  
a 2.791648544183534 8.1735e-09 au
q 2.40778152818215 4.1213e-08 au
i 8.132020655265025 4.6912e-07 deg
node 141.3488478596437 3.3383e-06 deg
peri 141.4137965113925 9.692e-06 deg
M 105.0927075011878 7.3314e-06 deg
tp 2458899.152866090753
(2020-Feb-19.65286609)
3.459e-05 TDB
period 1703.685940390349
4.66
7.4821e-06
2.048e-08
d
yr
n .2113065509700201 9.28e-10 deg/d
Q 3.175515560184917 9.2974e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3415  
   data-arc span      39355 days (107.75 yr)  
   first obs. used      1913-10-26  
   last obs. used      2021-07-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:02:52  

Additional Information
 Earth MOID = 1.39741 au 
 Jupiter MOID = 2.01333 au 
 T_jup = 3.300 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456751.5 (2014-Apr-04.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1365329446195211 1.5004e-08  
q 2.411216002664692 4.1065e-08 au
tp 2457197.512032452684
(2015-Jun-24.01203245)
3.5918e-05 TDB
node 141.4050663334177 3.3413e-06 deg
peri 142.113715033336 9.7992e-06 deg
i 8.126024490693576 4.6888e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3415  
   data-arc span      39355 days (107.75 yr)  
   first obs. used      1913-10-26  
   last obs. used      2021-07-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:02:52  

Additional Information
 Jupiter MOID = 2.01333 au 
 T_jup = 3.300 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.251098845356693E-16 -6.071088691204318E-16 -1.623062184916255E-14 1.790289508906751E-14 -2.859763076688062E-14 4.973860406730236E-15
q -6.071088691204318E-16 1.686348986098717E-15 -1.319062785144967E-14 -5.077817653342935E-14 6.411818921940975E-14 -1.352633599032457E-14
tp -1.623062184916255E-14 -1.319062785144967E-14 1.290105751162722E-9 2.08296354377371E-11 3.31904037325066E-10 -6.047618030253261E-12
node 1.790289508906751E-14 -5.077817653342935E-14 2.08296354377371E-11 1.116456724288784E-11 -5.02038454363779E-12 9.273278901782776E-13
peri -2.859763076688062E-14 6.411818921940975E-14 3.31904037325066E-10 -5.02038454363779E-12 9.602357482710484E-11 -2.707338684174922E-12
i 4.973860406730236E-15 -1.352633599032457E-14 -6.047618030253261E-12 9.273278901782776E-13 -2.707338684174922E-12 2.198462434774588E-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 10.26   n/a MPCxxxxx IRAS observations used: 11
diameter diameter 32.457 km 0.259 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 250. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2010) Minor Planet Bull. 37, 159-161.]
[Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) ArXiv:1707.07503.]
geometric albedo albedo 0.087   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.848   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.51, mean=4.52, max.=4.52) deg.
U-B UB 0.410   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.52 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B L   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)

824 Anastasia (A916 FF)          Discovered 1916-Mar-25 by Neujmin, G. at Simeis
Independent discovery Apr. 1 by M. Wolf, Heidelberg, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A916 FF = 1948 BB = 1950 RR1 = A913 TB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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