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407 Arachne (A895 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000407
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06995513828861384 3.0695e-08  
a 2.625086432012702 6.3783e-09 au
q 2.441448147641689 8.0811e-08 au
i 7.521705810196919 4.2703e-06 deg
node 294.5811360522623 2.3149e-05 deg
peri 82.44647834960001 3.9507e-05 deg
M 119.1023074958281 3.136e-05 deg
tp 2458486.537405645287
(2019-Jan-03.03740565)
0.00013516 TDB
period 1553.509229652649
4.25
5.6619e-06
1.55e-08
d
yr
n .2317334156299109 8.4457e-10 deg/d
Q 2.808724716383715 6.8244e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3184  
   data-arc span      44103 days (120.75 yr)  
   first obs. used      1899-09-05  
   last obs. used      2020-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43829  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:13:32  

Additional Information
 Earth MOID = 1.45612 au 
 Jupiter MOID = 2.54081 au 
 T_jup = 3.387 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455260.5 (2010-Mar-05.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07085053710608559 3.0978e-08  
q 2.440149133840542 8.1875e-08 au
tp 2455372.485019797805
(2010-Jun-24.98501980)
0.00013268 TDB
node 294.8096530012614 2.3103e-05 deg
peri 80.66326629780335 3.9143e-05 deg
i 7.52896867194296 4.2745e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3184  
   data-arc span      44103 days (120.75 yr)  
   first obs. used      1899-09-05  
   last obs. used      2020-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43829  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:13:32  

Additional Information
 Jupiter MOID = 2.54081 au 
 T_jup = 3.387 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.59630791712535E-16 -2.529702383078205E-15 -1.311758387022917E-12 1.986364238917972E-15 -3.427191369541772E-13 -8.288813135640369E-16
q -2.529702383078205E-15 6.703547702395473E-15 3.504845857379455E-12 -5.31130470089903E-15 9.123843226048303E-13 2.100006362852515E-15
tp -1.311758387022917E-12 3.504845857379455E-12 1.7604311513714E-8 -1.562373674571718E-12 4.197818982425635E-9 1.577251099784498E-12
node 1.986364238917972E-15 -5.31130470089903E-15 -1.562373674571718E-12 5.337262798186712E-10 -5.291057060918456E-10 1.353564802768537E-11
peri -3.427191369541772E-13 9.123843226048303E-13 4.197818982425635E-9 -5.291057060918456E-10 1.532197650004936E-9 -1.300783709236325E-11
i -8.288813135640369E-16 2.100006362852515E-15 1.577251099784498E-12 1.353564802768537E-11 -1.300783709236325E-11 1.827099203517887E-11

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 9.1   n/a MPO502156 IRAS observations used: 27
diameter diameter 95.07 km 5.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 27
rotation period rot_per 22.627 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Aznar Macias, A.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.0548   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 27
B-V BV 0.698   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.61, mean=14.85, max.=17.86) deg.
U-B UB 0.376   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.61, mean=14.85, max.=17.86) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

407 Arachne (A895 TB)          Discovered 1895-Oct-13 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A895 TB = 1950 UG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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