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971 Alsatia (A921 WH)
Classification: Main-belt Asteroid          SPK-ID: 2000971
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628393914007046 1.7048e-08  
a 2.640598981803162 6.978e-09 au
q 2.210605450673015 4.6476e-08 au
i 13.79084249172475 6.6432e-07 deg
node 83.49283557605213 3.9119e-06 deg
peri 6.515642514400192 6.904e-06 deg
M 46.90537023410799 6.0853e-06 deg
tp 2459192.292272846681
(2020-Dec-08.79227285)
2.6242e-05 TDB
period 1567.299893557544
4.29
6.2126e-06
1.701e-08
d
yr
n .2296943944677058 9.1048e-10 deg/d
Q 3.070592512933308 8.1143e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2992  
   data-arc span      41149 days (112.66 yr)  
   first obs. used      1908-10-29  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39212  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:12:27  

Additional Information
 Earth MOID = 1.22757 au 
 Jupiter MOID = 2.16142 au 
 T_jup = 3.336 
[ 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 10.16   n/a MPO614063 IRAS observations used: 11
diameter diameter 60.867 km 0.527 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.614 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Melton, E.; Carver, S.; Harris, A.; Karnemaat, R.; et al. (2012) Minor Planet Bull. 39, 131-133.]
[Warner, B.D (2012) Minor Planet Bull. 39, 69-80.]
[Klinglesmith III, D.A.; Hendrickx, S.; Kimber, C.; Madden, K. (2017) Minor Planet Bull. 44, 244-246.]
geometric albedo albedo 0.046   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.669   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.04 deg.
U-B UB 0.298   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.04 deg.
SMASSII spectral type spec_B C   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)

971 Alsatia (A921 WH)          Discovered 1921-Nov-23 by Schaumasse, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A921 WH = 1961 AA = A908 UE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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