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JPL Small-Body Database Browser
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677 Aaltje (A909 BP)
Classification: Main-belt Asteroid          SPK-ID: 2000677
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05050954117763202 3.7066e-08  
a 2.954479155799553 1.2801e-08 au
q 2.80524976922124 1.0975e-07 au
i 8.486978669602264 4.055e-06 deg
node 272.7136830664336 2.8135e-05 deg
peri 275.7546799865743 5.027e-05 deg
M 184.1462572012796 4.2763e-05 deg
tp 2459506.584993443397
(2021-Oct-19.08499344)
0.00022143 TDB
period 1854.897100558023
5.08
1.2055e-05
3.3e-08
d
yr
n .1940808467982933 1.2614e-09 deg/d
Q 3.103708542377866 1.3448e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2771  
   data-arc span      41352 days (113.22 yr)  
   first obs. used      1906-08-13  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43287  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:55:53  

Additional Information
 Earth MOID = 1.82164 au 
 Jupiter MOID = 1.96489 au 
 T_jup = 3.250 
[ 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 9.5   n/a MPO421632  
diameter diameter 32.403 km 0.442 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.608 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Oey, J. (2009) Minor Planet Bull. 36, 162-165.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.313   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sl   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)

677 Aaltje (A909 BP)          Discovered 1909-Jan-18 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A909 BP = A906 PA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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