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32 Pomona (A854 UA)
Classification: Main-belt Asteroid          SPK-ID: 2000032
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .081766602826505 2.4488e-08  
a 2.586748535807507 6.2755e-09 au
q 2.375238895668091 6.1714e-08 au
i 5.521970970912298 4.2678e-07 deg
node 220.3800248806064 2.7458e-06 deg
peri 338.8330105186996 1.2514e-05 deg
M 221.1362008722688 1.0792e-05 deg
tp 2459982.660146130204
(2023-Feb-07.16014613)
4.6139e-05 TDB
period 1519.601609147773
4.16
5.5298e-06
1.514e-08
d
yr
n .2369041976744787 8.621e-10 deg/d
Q 2.798258175946922 6.7886e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2646  
   data-arc span      57389 days (157.12 yr)  
   first obs. used      1864-01-07  
   last obs. used      2021-02-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54414  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:26:06  

Additional Information
 Earth MOID = 1.37388 au 
 Jupiter MOID = 2.16617 au 
 T_jup = 3.410 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457095.5 (2015-Mar-14.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08019595165233349 2.4551e-08  
q 2.37991832897043 6.1758e-08 au
tp 2456942.550474273268
(2014-Oct-12.05047427)
4.5037e-05 TDB
node 220.456808281533 2.745e-06 deg
peri 338.9225849176201 1.2694e-05 deg
i 5.523870098333105 4.2713e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2646  
   data-arc span      57389 days (157.12 yr)  
   first obs. used      1864-01-07  
   last obs. used      2021-02-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54414  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:26:06  

Additional Information
 Jupiter MOID = 2.16617 au 
 T_jup = 3.410 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.027358967792709E-16 -1.510168114880669E-15 1.485959478016001E-13 -1.641695286299681E-14 8.220169178786329E-15 -1.457769550841051E-15
q -1.510168114880669E-15 3.814031889071838E-15 -3.731775005530642E-13 4.134660402755373E-14 -2.062607608630136E-14 3.771677597777519E-15
tp 1.485959478016001E-13 -3.731775005530642E-13 2.028327516196984E-9 -5.339911763311316E-11 5.589326372579063E-10 -6.123751747689247E-12
node -1.641695286299681E-14 4.134660402755373E-14 -5.339911763311316E-11 7.535008146684707E-12 -1.917426829344714E-11 5.082474597294408E-13
peri 8.220169178786329E-15 -2.062607608630136E-14 5.589326372579063E-10 -1.917426829344714E-11 1.6113307259488E-10 -1.989400616745007E-12
i -1.457769550841051E-15 3.771677597777519E-15 -6.123751747689247E-12 5.082474597294408E-13 -1.989400616745007E-12 1.824402552758872E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.66   n/a E2021B10 IRAS observations used: 25
diameter diameter 80.76 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
rotation period rot_per 9.448 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Schober, H.J. (1976) Astron. Astrophys. 53, 115-119.]
[Chang, Y.C.; Zhou, X.-h.; Yang, X.-y.; Zhang, Y.-y.; et al. (1981) Acta Astron. Sin. 22, 169-173; Chin. Astron. Astrophys. 5, 434-437.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2564   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
B-V BV 0.857   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.45, mean=13.75, max.=24.02) deg.
U-B UB 0.429   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.45, mean=13.75, max.=24.02) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

32 Pomona (A854 UA)          Discovered 1854-Oct-26 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A854 UA = 1945 RB = 1949 SH = 1950 YD = A899 QA = A911 KF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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