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170 Maria (A877 AA)
Classification: Main-belt Asteroid          SPK-ID: 2000170
[ 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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06349546632208476 3.3774e-08  
a 2.553287574877233 7.1085e-09 au
q 2.391165389656018 8.5877e-08 au
i 14.37880498635236 4.2811e-06 deg
node 301.2966475386262 1.7491e-05 deg
peri 158.2681804055249 4.7196e-05 deg
M 67.20213577346452 4.2135e-05 deg
tp 2458722.318272617863
(2019-Aug-26.81827262)		 0.00017469 TDB
period 1490.211891407072
4.08		 6.2233e-06
1.704e-08		 d
yr
n .2415763839195274 1.0088e-09 deg/d
Q 2.715409760098447 7.5599e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2578  
   data-arc span      44190 days (120.99 yr)  
   first obs. used      1899-08-02  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40623  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:11:00  

Additional Information
 Earth MOID = 1.41217 au 
 Jupiter MOID = 2.39555 au 
 T_jup = 3.392 
[ 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 9.4   n/a MPO502154 IRAS observations used: 12
diameter diameter 33.136 km 0.831 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 13.120 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Denchev, P. (1999) Abstracts of ACM 1999, 117.]
[Denchev, P. (2000) Planet. Space Sci. 48, 987-992.]
[Warner, B.D. (2007) Minor Planet Bull. 34, 72-77.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.282   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.886   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.87 deg.
U-B UB 0.447   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.87 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
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)

170 Maria (A877 AA)          Discovered 1877-Jan-10 by Perrotin, J. at Toulouse
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A877 AA = 1958 AC 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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