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850 Altona (A916 FG)
Classification: Main-belt Asteroid          SPK-ID: 2000850
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1253451685069393 3.4648e-08  
a 2.999383413994178 1.2055e-08 au
q 2.623425194550158 1.0646e-07 au
i 15.54584505879596 3.7475e-06 deg
node 121.1312009501981 1.529e-05 deg
peri 134.9465230802958 2.231e-05 deg
M 318.7023411912026 1.6796e-05 deg
tp 2459218.155344859115
(2021-Jan-03.65534486)
8.8734e-05 TDB
period 1897.345428515908
5.19
1.1439e-05
3.132e-08
d
yr
n .1897387763922302 1.1439e-09 deg/d
Q 3.375341633438197 1.3566e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3080  
   data-arc span      37627 days (103.02 yr)  
   first obs. used      1917-07-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:23:22  

Additional Information
 Earth MOID = 1.63142 au 
 Jupiter MOID = 1.86244 au 
 T_jup = 3.186 
[ 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 9.7   n/a MPO384753  
diameter diameter 80.90 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 11.1913 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V. (2011) Minor Planet Bull. 38, 15-16.]
[Alkema, M.S. (2013) Minor Planet Bull. 40, 133-137.]
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 39-45.]
geometric albedo albedo 0.0390   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11

850 Altona (A916 FG)          Discovered 1916-Mar-27 by Belyavskij, S. at Simeis
Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 FG = A923 RP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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