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679 Pax (A909 BR)
Classification: Main-belt Asteroid          SPK-ID: 2000679
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3090877281618276 3.7088e-08  
a 2.586993675352917 8.8787e-09 au
q 1.787385677469067 9.673e-08 au
i 24.40703841943416 4.5869e-06 deg
node 112.116894251112 1.073e-05 deg
peri 266.9736030923488 1.3061e-05 deg
M 4.827132794547426 1.1357e-05 deg
tp 2458980.121218025066
(2020-May-10.62121803)
4.7869e-05 TDB
period 1519.817627404633
4.16
7.8242e-06
2.142e-08
d
yr
n .2368705254555877 1.2194e-09 deg/d
Q 3.386601673236767 1.1623e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2741  
   data-arc span      40729 days (111.51 yr)  
   first obs. used      1909-01-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40295  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:20:23  

Additional Information
 Earth MOID = .963711 au 
 Jupiter MOID = 2.61678 au 
 T_jup = 3.233 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455940.5 (2012-Jan-14.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3120598708945079 3.7267e-08  
q 1.779078285177695 9.7456e-08 au
tp 2455941.824457134723
(2012-Jan-15.32445713)
3.71e-05 TDB
node 112.2807841729619 1.0761e-05 deg
peri 266.910884508468 1.2995e-05 deg
i 24.38173479378113 4.5839e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2741  
   data-arc span      40729 days (111.51 yr)  
   first obs. used      1909-01-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40295  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:20:23  

Additional Information
 Jupiter MOID = 2.61678 au 
 T_jup = 3.233 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.388809652655189E-15 -3.624914378218769E-15 1.684082841133432E-14 -1.752006568316037E-15 2.92759667749952E-15 -1.730053664987133E-15
q -3.624914378218769E-15 9.497636985660301E-15 6.858246143879503E-14 5.263693216323288E-15 1.279311769018926E-14 5.185014081884333E-15
tp 1.684082841133432E-14 6.858246143879503E-14 1.376390981662176E-9 1.921825914520097E-12 2.951714813406239E-10 -7.944506411030114E-13
node -1.752006568316037E-15 5.263693216323288E-15 1.921825914520097E-12 1.158028784144589E-10 -1.043403924326621E-10 -3.040728953113799E-12
peri 2.92759667749952E-15 1.279311769018926E-14 2.951714813406239E-10 -1.043403924326621E-10 1.688795244708431E-10 2.548775485803085E-12
i -1.730053664987133E-15 5.185014081884333E-15 -7.944506411030114E-13 -3.040728953113799E-12 2.548775485803085E-12 2.101220416277984E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.1   n/a MPO492757 IRAS observations used: 3
diameter diameter 63.909 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.452 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I.; et al. (1994) Astron. Astrophys. Suppl. Ser. 105, 281-300.]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2003) Abstracts of Photometry and Polarimetry of Asteroids: Impact on Collaboration, Kharkiv, 9-10.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marciniak, A.; Michalowski, T.; Polinska, M.; Bartczak, P.; et al. (2011) Astron. Astrophys. 529, A107.]
[Wang, Y.-B.; Xu, Y.; Fan, C.-B.; Liu, C.-Z. (2018). Astron. Nach. 339, 457-464.]
geometric albedo albedo 0.110   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.857   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=13.21, mean=21.87, max.=26.35) deg.
U-B UB 0.447   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=13.21, mean=21.87, max.=26.35) deg.
Tholen spectral type spec_T I   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B K   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)

679 Pax (A909 BR)          Discovered 1909-Jan-28 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A909 BR = 1973 QD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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