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1545 Thernoe (1941 UW)
Classification: Main-belt Asteroid          SPK-ID: 2001545
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2382457763740629 1.9063e-08  
a 2.770641622808678 7.4708e-09 au
q 2.110547958328331 5.4003e-08 au
i 2.953407339218942 1.0345e-06 deg
node 51.79862278437788 3.9167e-06 deg
peri 90.29897024301974 4.7775e-06 deg
M 341.8070838504178 3.4465e-06 deg
tp 2459285.627283604564
(2021-Mar-12.12728360)
1.6252e-05 TDB
period 1684.492021272067
4.61
6.8132e-06
1.865e-08
d
yr
n .2137142803016313 8.644e-10 deg/d
Q 3.430735287289025 9.2507e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3079  
   data-arc span      42003 days (115.00 yr)  
   first obs. used      1906-03-21  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42578  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:34:06  

Additional Information
 Earth MOID = 1.12569 au 
 Jupiter MOID = 1.60028 au 
 T_jup = 3.294 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457149.5 (2015-May-07.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2378047248529159 1.9175e-08  
q 2.111524631464408 5.4355e-08 au
tp 2457603.587551197322
(2016-Aug-03.08755120)
1.516e-05 TDB
node 51.80806604494851 3.9189e-06 deg
peri 90.63924847698614 4.7648e-06 deg
i 2.953787114892013 1.0341e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3079  
   data-arc span      42003 days (115.00 yr)  
   first obs. used      1906-03-21  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42578  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:34:06  

Additional Information
 Jupiter MOID = 1.60028 au 
 T_jup = 3.294 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.676948006189724E-16 -1.036618989093822E-15 -1.429965759408472E-13 -2.405586756611673E-14 2.682455216720161E-14 -5.158195833068988E-15
q -1.036618989093822E-15 2.954413937474393E-15 3.913062808448607E-13 6.693447818300222E-14 -7.935447411161622E-14 1.439633586661847E-14
tp -1.429965759408472E-13 3.913062808448607E-13 2.298123041157805E-10 1.06379359880448E-11 3.099845563319801E-11 4.611481042466996E-12
node -2.405586756611673E-14 6.693447818300222E-14 1.06379359880448E-11 1.53574503545721E-11 -1.345633530974023E-11 1.752203858173695E-12
peri 2.682455216720161E-14 -7.935447411161622E-14 3.099845563319801E-11 -1.345633530974023E-11 2.270366937781157E-11 -9.426582669178016E-13
i -5.158195833068988E-15 1.439633586661847E-14 4.611481042466996E-12 1.752203858173695E-12 -9.426582669178016E-13 1.069369235371552E-12

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 11.88   n/a E2021B10  
diameter diameter 18.656 km 0.376 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 17.20 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.]
geometric albedo albedo 0.097   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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)

1545 Thernoe (1941 UW)          Discovered 1941-Oct-15 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1941 UW = 1932 YD = 1955 VV = 1957 HY = A906 FE = A915 CE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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