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570 Kythera (A905 OF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000570
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184386190499055 1.7914e-08  
a 3.418279896635499 1.0542e-08 au
q 3.013423546151937 5.7494e-08 au
i 1.816951361651673 3.2682e-07 deg
node 223.3428542436967 1.2395e-05 deg
peri 161.4623055633768 1.4041e-05 deg
M 8.55150202522886 4.6467e-06 deg
tp 2459145.666021133953
(2020-Oct-23.16602113)
2.9737e-05 TDB
period 2308.393582032575
6.32
1.0679e-05
2.924e-08
d
yr
n .1559526082562639 7.2147e-10 deg/d
Q 3.823136247119061 1.1791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      4026  
   data-arc span      42223 days (115.60 yr)  
   first obs. used      1905-07-31  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43988  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:06:14  

Additional Information
 Earth MOID = 2.01608 au 
 Jupiter MOID = 1.63029 au 
 T_jup = 3.131 
[ 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 8.77   n/a E2021B10 IRAS observations used: 6
diameter diameter 87.486 km 0.784 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.120 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Aznar, A.M.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.]
geometric albedo albedo 0.069   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.775   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=.23, mean=8.39, max.=15.80) deg.
U-B UB 0.374   0.071 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=.23, mean=8.39, max.=15.80) deg.
Tholen spectral type spec_T ST   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B T   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)

570 Kythera (A905 OF)          Discovered 1905-Jul-30 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A905 OF = 1952 BE = 1994 PG40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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