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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06346060734069461 3.3488e-08  
a 2.552868714155474 6.4025e-09 au
q 2.390862115094109 8.5209e-08 au
i 14.37881453232129 4.2363e-06 deg
node 301.2963173711759 1.7433e-05 deg
peri 158.1166102783112 4.6353e-05 deg
M 115.6808598215485 4.1435e-05 deg
tp 2458721.759514858668
(2019-Aug-26.25951486)
0.00017183 TDB
period 1489.845207899946
4.08
5.6047e-06
1.534e-08
d
yr
n .241635841153893 9.0902e-10 deg/d
Q 2.714875313216838 6.8088e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2659  
   data-arc span      52652 days (144.15 yr)  
   first obs. used      1877-01-22  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40268  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:58:32  

Additional Information
 Earth MOID = 1.41179 au 
 Jupiter MOID = 2.39595 au 
 T_jup = 3.393 
[ 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 9.35   n/a E2021B10 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

Alternate Designations
 A877 AA = 1958 AC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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