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3169 Ostro (1981 LA)
Classification: Inner Main-belt Asteroid          SPK-ID: 2003169
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06663429735013081 3.4807e-08  
a 1.892180630157116 5.2392e-09 au
q 1.766096503407069 6.6884e-08 au
i 24.90646425493105 5.3256e-06 deg
node 96.37221104605017 1.045e-05 deg
peri 32.67286892437019 4.6099e-05 deg
M 139.1375647081879 4.5399e-05 deg
tp 2458633.061878240173
(2019-May-29.56187824)
0.00011939 TDB
period 950.6974202902184
2.60
3.9485e-06
1.081e-08
d
yr
n .3786693771506219 1.5727e-09 deg/d
Q 2.018264756907164 5.5883e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2041  
   data-arc span      24325 days (66.60 yr)  
   first obs. used      1953-12-31  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32354  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:00:41  

Additional Information
 Earth MOID = .796836 au 
 Jupiter MOID = 3.14702 au 
 T_jup = 3.841 
[ 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 12.7   n/a MPO473809  
diameter diameter 4.662 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.503 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z. (1991) Icarus 90, 117-122.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Descamps, P.; Marchis, F.; Pyrot, A.; Teng-Chuen, J.-P.; et al. (2005) CBET 320.]
[Descamps, P.; Marchis, F.; Michalowski, T.; Colas, F.; et al. (2007) Icarus 189, 362-369.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Warner, B.D. (2012) Minor Planet Bull. 39, 245-252.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 102-112.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2017) Minor Planet Bull. 44, 213-219.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 19-34.]
geometric albedo albedo 0.960   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.771   0.008 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=33.08, mean=33.10, max.=33.12) deg.
U-B UB 0.306   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=33.08, mean=33.10, max.=33.12) deg.
Tholen spectral type spec_T TS   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices
SMASSII spectral type spec_B Xe   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)

3169 Ostro (1981 LA)          Discovered 1981-Jun-04 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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