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246 Asporina (A885 EA)
Classification: Main-belt Asteroid          SPK-ID: 2000246
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1093540609229184 2.1471e-08  
a 2.694141977110213 4.9987e-09 au
q 2.399526611210311 5.7755e-08 au
i 15.62074464474339 8.6163e-07 deg
node 162.2844757992236 1.7748e-06 deg
peri 96.19845694851628 9.1948e-06 deg
M 169.585253200255 8.4499e-06 deg
tp 2458439.622523632451
(2018-Nov-17.12252363)
3.6865e-05 TDB
period 1615.210558248622
4.42
4.4953e-06
1.231e-08
d
yr
n .2228811582251848 6.203e-10 deg/d
Q 2.988757343010116 5.5453e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3468  
   data-arc span      49680 days (136.02 yr)  
   first obs. used      1885-03-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:33:55  

Additional Information
 Earth MOID = 1.44403 au 
 Jupiter MOID = 2.19588 au 
 T_jup = 3.309 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.48   n/a E2021B10 IRAS observations used: 19
diameter diameter 50.891 km 0.439 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.222 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2006) IAU 2006, poster paper.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Lucas, M.P.; Ryan, J.; Fauerbach, M.; Grasso, S. (2011) Minor Planet Bull. 38, 218-220.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.193   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.990   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.32, mean=11.95, max.=16.58) deg.
U-B UB 0.602   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.32, mean=11.95, max.=16.58) deg.
Tholen spectral type spec_T A   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B A   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)

246 Asporina (A885 EA)          Discovered 1885-Mar-06 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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