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1021 Flammario (A924 EW)
Classification: Main-belt Asteroid          SPK-ID: 2001021
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 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2850489223497336 1.9338e-08  
a 2.737738985866449 7.9099e-09 au
q 1.957349438270365 5.399e-08 au
i 15.86921120718031 3.6998e-07 deg
node 115.4410829919886 3.5237e-06 deg
peri 286.7190145210747 5.1705e-06 deg
M 271.5539206650612 7.8236e-06 deg
tp 2459803.001893497910
(2022-Aug-11.50189350)
3.7301e-05 TDB
period 1654.575112426027
4.53
7.1706e-06
1.963e-08
d
yr
n .2175785174673325 9.4295e-10 deg/d
Q 3.518128533462533 1.0165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3175  
   data-arc span      35146 days (96.22 yr)  
   first obs. used      1925-05-18  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40729  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:15:33  

Additional Information
 Earth MOID = 1.03235 au 
 Jupiter MOID = 2.11866 au 
 T_jup = 3.238 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456528.5 (2013-Aug-24.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2846086569207623 1.9308e-08  
q 1.95862903001616 5.3745e-08 au
tp 2456498.303830950935
(2013-Jul-24.80383095)
2.7565e-05 TDB
node 115.4562622654676 3.5227e-06 deg
peri 287.279937999724 5.1673e-06 deg
i 15.86946115822032 3.7046e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3175  
   data-arc span      35146 days (96.22 yr)  
   first obs. used      1925-05-18  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40729  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:15:33  

Additional Information
 Jupiter MOID = 2.11866 au 
 T_jup = 3.238 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.728107877413945E-16 -1.031950337675109E-15 -7.892018531517987E-15 7.317235250243133E-15 -2.032424588932848E-14 1.881689924355545E-16
q -1.031950337675109E-15 2.888538647965085E-15 9.93540395487748E-14 -1.955316223829556E-14 6.819383610659883E-14 -5.24889367093808E-16
tp -7.892018531517987E-15 9.93540395487748E-14 7.598199006038078E-10 5.721006990054271E-12 1.049927806068201E-10 -6.537424837288444E-13
node 7.317235250243133E-15 -1.955316223829556E-14 5.721006990054271E-12 1.240949130365667E-11 -1.098993960104583E-11 -4.536807982952166E-13
peri -2.032424588932848E-14 6.819383610659883E-14 1.049927806068201E-10 -1.098993960104583E-11 2.670117352877505E-11 2.706318391398071E-13
i 1.881689924355545E-16 -5.24889367093808E-16 -6.537424837288444E-13 -4.536807982952166E-13 2.706318391398071E-13 1.372442472205677E-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 9.12   n/a E2021B10 IRAS observations used: 11
diameter diameter 100.765 km 1.608 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.160 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I. (1993) Astron. Astrophys. Suppl. Ser. 101, 499-505.]
[Hainaut-Rouelle, M.-C.; Hainaut, O.R.; Detal, A. (1995) Astron. Astrophys. Suppl. Ser. 112, 125-142.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Buchheim, R.K. (2005) Minor Planet Bull. 32, 79-80.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.045   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.656   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=15.21, mean=22.50, max.=28.53) deg.
U-B UB 0.230   0.046 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=15.21, mean=22.50, max.=28.53) deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B B   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)

1021 Flammario (A924 EW)          Discovered 1924-Mar-11 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A924 EW = 1977 UM = A910 CE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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