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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 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .285048922257171 1.9532e-08  
a 2.737738985819345 7.9881e-09 au
q 1.9573494384901 5.4407e-08 au
i 15.86921120764 3.7005e-07 deg
node 115.4410829655272 3.5297e-06 deg
peri 286.719014540087 5.1889e-06 deg
M 271.5539206862461 7.9189e-06 deg
tp 2459803.001893390052
(2022-Aug-11.50189339)
3.7761e-05 TDB
period 1654.575112383326
4.53
7.2415e-06
1.983e-08
d
yr
n .2175785174729478 9.5227e-10 deg/d
Q 3.518128533148589 1.0265e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3091  
   data-arc span      35099 days (96.10 yr)  
   first obs. used      1925-05-18  
   last obs. used      2021-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41123  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:51:15  

Additional Information
 Earth MOID = 1.03235 au 
 Jupiter MOID = 2.11866 au 
 T_jup = 3.238 
[ show covariance matrix ]

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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