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147 Protogeneia (A875 NA)
Classification: Main-belt Asteroid          SPK-ID: 2000147
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 60 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02326939296456578 1.4305e-08  
a 3.134497018489359 9.8533e-09 au
q 3.061559175619871 4.2382e-08 au
i 1.933326780106844 1.0761e-06 deg
node 248.2530323466884 3.5836e-05 deg
peri 100.9416275135019 6.2441e-05 deg
M 16.40583295168363 5.4885e-05 deg
tp 2459108.126796998426
(2020-Sep-15.62679700)
0.00030916 TDB
period 2026.983523390924
5.55
9.5577e-06
2.617e-08
d
yr
n .1776038116963866 8.3744e-10 deg/d
Q 3.207434861358848 1.0083e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3711  
   data-arc span      53101 days (145.38 yr)  
   first obs. used      1875-09-25  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4231  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:21:54  

Additional Information
 Earth MOID = 2.05303 au 
 Jupiter MOID = 1.89207 au 
 T_jup = 3.211 
[ 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 8.80   n/a E2021B10  
diameter diameter 132.93 km 5.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 7.8528 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]
[Buchheim, R.K. (2005) Minor Planet Bull. 32, 35-36.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.0492   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV 0.678   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.00, mean=2.06, max.=3.43) deg.
U-B UB 0.293   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.00, mean=2.22, max.=3.43) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
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)

147 Protogeneia (A875 NA)          Discovered 1875-Jul-10 by Schulhof, L. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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