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2911 Miahelena (1938 GJ)
Classification: Main-belt Asteroid          SPK-ID: 2002911
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09772385349973821 3.3951e-08  
a 2.792599735587577 1.2225e-08 au
q 2.519696128143609 9.4913e-08 au
i 9.617055297958643 3.6579e-06 deg
node 149.2246335301245 2.0704e-05 deg
peri 64.43505522813656 2.8099e-05 deg
M 198.6220182472697 2.1428e-05 deg
tp 2459764.605357401660
(2022-Jul-04.10535740)
0.00010367 TDB
period 1704.556753511039
4.67
1.1193e-05
3.064e-08
d
yr
n .2111986000222484 1.3869e-09 deg/d
Q 3.065503343031545 1.342e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2514  
   data-arc span      30068 days (82.32 yr)  
   first obs. used      1938-04-07  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4384  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:57:52  

Additional Information
 Earth MOID = 1.53283 au 
 Jupiter MOID = 1.94377 au 
 T_jup = 3.301 
[ 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 11.7   n/a MPO452203  
diameter diameter 12.214 km 0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.201 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Brinsfield, J. (2008) Minor Planet Bull. 35, 119-122.]
[Klinglesmith III, D.A.; Hanowell, J.; Risely, E.; Turk, J.; et al. (2013) Minor Planet Bull. 40, 190-193.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 27-32.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.358   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B S   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)

2911 Miahelena (1938 GJ)          Discovered 1938-Apr-08 by Alikoski, H. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 GJ = 1928 DL = 1942 CM = 1952 HQ1 = 1952 HZ1 = 1971 HK = 1975 EF2 = 1977 TE6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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