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Post Info TOPIC: Comet 10P/Tempel 2

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Posts: 131433
Date:
 RE: Comet 10P/Tempel 2 Permalink Comet 10P/Tempel 2 makes its closest approach to the Earth (1.319 AU) in the constellation Bootes on the 24th May 2015EphemerisDate TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2015 05 23 14 09 30.5 +07 53 01 1.3195 2.2024 141.3 16.7 14.2 2015 05 24 14 08 38.1 +07 52 28 1.3195 2.1961 140.3 17.1 14.1 2015 05 25 14 07 46.9 +07 51 37 1.3196 2.1898 139.4 17.5 14.1 2015 05 26 14 06 57.0 +07 50 25 1.3200 2.1836 138.4 17.9 14.1 2015 05 27 14 06 08.5 +07 48 55 1.3205 2.1773 137.4 18.3 14.1 2015 05 28 14 05 21.3 +07 47 06 1.3211 2.1711 136.5 18.7 14.0 2015 05 29 14 04 35.6 +07 44 57 1.3220 2.1648 135.5 19.1 14.0 2015 05 30 14 03 51.4 +07 42 30 1.3230 2.1585 134.6 19.5 14.0 2015 05 31 14 03 08.8 +07 39 44 1.3241 2.1523 133.6 19.9 13.9 2015 06 01 14 02 27.7 +07 36 39 1.3254 2.1460 132.6 20.3 13.9 2015 06 02 14 01 48.2 +07 33 16 1.3269 2.1398 131.7 20.7 13.9 2015 06 03 14 01 10.4 +07 29 35 1.3285 2.1335 130.7 21.1 13.8 2015 06 04 14 00 34.3 +07 25 35 1.3302 2.1273 129.8 21.5 13.8 2015 06 05 13 59 59.9 +07 21 18 1.3320 2.1210 128.8 21.9 13.8 2015 06 06 13 59 27.2 +07 16 42 1.3340 2.1148 127.9 22.2 13.8 2015 06 07 13 58 56.4 +07 11 49 1.3361 2.1085 127.0 22.6 13.7 2015 06 08 13 58 27.3 +07 06 39 1.3384 2.1023 126.0 23.0 13.7 2015 06 09 13 58 00.1 +07 01 12 1.3407 2.0960 125.1 23.3 13.7 2015 06 10 13 57 34.8 +06 55 27 1.3432 2.0898 124.2 23.7 13.6 2015 06 11 13 57 11.3 +06 49 26 1.3457 2.0835 123.3 24.0 13.6 2015 06 12 13 56 49.8 +06 43 08 1.3484 2.0773 122.4 24.4 13.6 2015 06 13 13 56 30.2 +06 36 34 1.3512 2.0711 121.5 24.7 13.6 2015 06 14 13 56 12.6 +06 29 44 1.3540 2.0648 120.6 25.1 13.5 2015 06 15 13 55 56.9 +06 22 38 1.3570 2.0586 119.7 25.4 13.5 2015 06 16 13 55 43.2 +06 15 16 1.3601 2.0524 118.8 25.7 13.5 2015 06 17 13 55 31.5 +06 07 39 1.3632 2.0462 117.9 26.0 13.4 2015 06 18 13 55 21.9 +05 59 47 1.3664 2.0400 117.0 26.3 13.4 2015 06 19 13 55 14.2 +05 51 40 1.3697 2.0337 116.2 26.6 13.4 2015 06 20 13 55 08.6 +05 43 19 1.3731 2.0275 115.3 26.9 13.4 2015 06 21 13 55 05.0 +05 34 44 1.3765 2.0213 114.5 27.2 13.3 2015 06 22 13 55 03.4 +05 25 55 1.3800 2.0152 113.6 27.5 13.3 2015 06 23 13 55 03.9 +05 16 52 1.3835 2.0090 112.8 27.8 13.3 2015 06 24 13 55 06.4 +05 07 35 1.3871 2.0028 112.0 28.1 13.3 2015 06 25 13 55 10.9 +04 58 06 1.3908 1.9966 111.1 28.3 13.2 2015 06 26 13 55 17.4 +04 48 24 1.3945 1.9905 110.3 28.6 13.2 2015 06 27 13 55 25.9 +04 38 29 1.3982 1.9843 109.5 28.9 13.2 2015 06 28 13 55 36.5 +04 28 22 1.4020 1.9781 108.7 29.1 13.1 2015 06 29 13 55 49.0 +04 18 04 1.4058 1.9720 107.9 29.4 13.1 2015 06 30 13 56 03.5 +04 07 33 1.4097 1.9659 107.1 29.6 13.1 __________________

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Posts: 131433
Date:
 Permalink Comet 10P/Tempel 2 is at Opposition (1.415 AU) in the constellation Virgo on the 24th April 2015 EphemerisDate TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2015 04 20 14 41 54.8 +05 33 43 1.4441 2.4077 158.7 8.7 15.3 2015 04 21 14 41 02.6 +05 41 17 1.4364 2.4016 159.0 8.6 15.3 2015 04 22 14 40 09.2 +05 48 43 1.4290 2.3954 159.2 8.6 15.3 2015 04 23 14 39 14.9 +05 56 01 1.4219 2.3892 159.4 8.5 15.2 2015 04 24 14 38 19.5 +06 03 11 1.4150 2.3830 159.5 8.5 15.2 2015 04 25 14 37 23.2 +06 10 13 1.4083 2.3768 159.5 8.5 15.1 2015 04 26 14 36 26.0 +06 17 04 1.4019 2.3707 159.5 8.5 15.1 2015 04 27 14 35 28.1 +06 23 46 1.3958 2.3645 159.4 8.6 15.1 2015 04 28 14 34 29.4 +06 30 17 1.3899 2.3583 159.2 8.7 15.0 2015 04 29 14 33 30.0 +06 36 36 1.3842 2.3521 159.0 8.8 15.0 2015 04 30 14 32 30.0 +06 42 44 1.3788 2.3459 158.7 9.0 15.0 2015 05 01 14 31 29.5 +06 48 40 1.3737 2.3397 158.3 9.1 14.9 2015 05 02 14 30 28.5 +06 54 23 1.3688 2.3334 157.9 9.3 14.9 2015 05 03 14 29 27.1 +06 59 53 1.3641 2.3272 157.4 9.6 14.8 2015 05 04 14 28 25.4 +07 05 09 1.3597 2.3210 156.9 9.8 14.8 2015 05 05 14 27 23.4 +07 10 10 1.3556 2.3148 156.3 10.1 14.8 2015 05 06 14 26 21.3 +07 14 57 1.3516 2.3086 155.7 10.4 14.7 2015 05 07 14 25 19.0 +07 19 30 1.3479 2.3023 155.1 10.7 14.7 2015 05 08 14 24 16.7 +07 23 46 1.3445 2.2961 154.4 11.0 14.7 2015 05 09 14 23 14.5 +07 27 47 1.3413 2.2899 153.6 11.3 14.6 2015 05 10 14 22 12.3 +07 31 31 1.3383 2.2836 152.9 11.6 14.6 __________________

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Posts: 131433
Date:
 Comet 10P/Tempel Permalink Comet 10P/Tempel is at Opposition (3.276 AU) on the 26th February 2014EphemerisDate TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2014 02 25 10 53 42.0 +17 56 54 3.2794 4.2572 169.8 2.4 2014 02 26 10 52 57.3 +18 02 40 3.2763 4.2546 169.9 2.3 2014 02 27 10 52 12.4 +18 08 24 3.2735 4.2520 169.9 2.3 2014 02 28 10 51 27.3 +18 14 04 3.2711 4.2493 169.7 2.4 2014 03 01 10 50 42.1 +18 19 41 3.2689 4.2467 169.4 2.5 2014 03 02 10 49 56.7 +18 25 14 3.2671 4.2440 169.0 2.6 2014 03 03 10 49 11.2 +18 30 43 3.2656 4.2414 168.4 2.7 2014 03 04 10 48 25.7 +18 36 08 3.2644 4.2387 167.8 2.8 2014 03 05 10 47 40.1 +18 41 29 3.2635 4.2360 167.1 3.0 2014 03 06 10 46 54.6 +18 46 45 3.2630 4.2334 166.3 3.2 2014 03 07 10 46 09.1 +18 51 56 3.2627 4.2307 165.5 3.4 2014 03 08 10 45 23.7 +18 57 02 3.2628 4.2280 164.6 3.6 2014 03 09 10 44 38.4 +19 02 03 3.2632 4.2253 163.7 3.8 2014 03 10 10 43 53.3 +19 06 58 3.2639 4.2225 162.8 4.0 __________________

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Posts: 131433
Date:
 RE: Comet 10P/Tempel 2 Permalink Title: The formation heritage of Jupiter Family Comet 10P/Tempel 2 as revealed by infrared spectroscopy Authors: L. Paganini, M. J. Mumma, B. P. Bonev, G. L. Villanueva, M. A. DiSanti, J. V. Keane, K. J. Meech We present spectral and spatial information for major volatile species in Comet 10P/Tempel 2, based on high-dispersion infrared spectra acquired on UT 2010 July 26 (heliocentric distance Rh = 1.44 AU) and September 18 (Rh = 1.62 AU), following the comet's perihelion passage on UT 2010 July 04. The total production rate for water on July 26 was (1.90 ± 0.12) x 10^28 molecules s-1, and abundances of six trace gases (relative to water) were: CH3OH (1.58% ± 0.23), C2H6 (0.39% ± 0.04), NH3 (0.83% ± 0.20), and HCN (0.13% ± 0.02). A detailed analysis of intensities for water emission lines provided a rotational temperature of 35 ± 3 K. The mean OPR is consistent with nuclear spin populations in statistical equilibrium (OPR = 3.01 ± 0.18), and the (1{\sigma}) lower bound corresponds to a spin temperature > 38 K. Our measurements were contemporaneous with a jet-like feature observed at optical wavelengths. The spatial profiles of four primary volatiles display strong enhancements in the jet direction, which favours release from a localised vent on the nucleus. The measured IR continuum is much more sharply peaked and is consistent with a dominant contribution from the nucleus itself. The peak intensities for H2O, CH3OH, and C2H6 are offset by ~200 km in the jet direction, suggesting the possible existence of a distributed source, such as the release of icy grains that subsequently sublimed in the coma. On UT September 18, no obvious emission lines were present in our spectra, nevertheless we obtained a 3{\sigma} upper limit Q(H2O) < 2.86 x 10^27 molecules s-1. Read more (645kb, PDF) __________________

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Posts: 131433
Date:
 Permalink Title: Ammonia and other parent molecules in comet 10P/Tempel 2 from Herschel/HIFI and ground-based radio observations Authors: N. Biver, J. Crovisier, D. Bockelée-Morvan, S. Szutowicz, D.C. Lis, P. Hartogh, M. de Val-Borro, R. Moreno, J. Boissier, M. Kidger, M. Küppers, G. Paubert, N. Dello Russo, R. Vervack, H. Weaver, HssO team The Jupiter-family comet 10P/Tempel 2 was observed during its 2010 return with the Herschel Space Observatory. We present here the observation of the (J, K) = (1, 0)-(0, 0) transition of ammonia at 572 GHz in this comet with the Heterodyne Instrument for the Far Infrared (HIFI) of Herschel. We also report on radio observations of other molecules (HCN, CH3OH, H2S and CS) obtained during the 1999 return of the comet with the CSO telescope and the JCMT, and during its 2010 return with the IRAM 30-m telescope. Molecular abundances relative to water are 0.09%, 1.8%, 0.4%, and 0.08% for HCN, CH3OH, H2S, and CS, respectively. An abundance of 0.5% for NH3 is obtained, which is similar to the values measured in other comets. The hyperfine structure of the ammonia line is resolved for the first time in an astronomical source. Strong anisotropy in the outgassing is present in all observations from 1999 to 2010 and is modelled to derive the production rates. Read more (160kb, PDF) __________________

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Posts: 131433
Date:
 Permalink Comet 10P/Tempel 2 makes its closest approach to the Earth (0.651 AU) on the 25th August, 2010. __________________

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Posts: 131433
Date:
 Permalink Comet 10P (Tempel) in the constellation Cetus, 3:12 UT, 10th August, 2010.Magnitude=10.1magBest seen from  3.2h - 3.3h RA= 1h18m14  Dec=-10°58.0' (J2000) Distance to Sun= 1.47AU  Distance to Earth= 0.66AU  Elongation=122°hourly motion: dRA= 55.3"/h  dDec=-27.8"/h __________________

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Posts: 131433
Date:
 Permalink Comet 10P/Tempel can be observed in the Southeast part of the sky, located quite low above the horizon. The comet is now at a maximum (approximately 9.3) brightness and will remain so for the near future. The comet has already passed its perihelion, but observing is best planed for the period from 5 to 21 August. At this time the moon will be between the new moon and the first quarter phases.EphemerisDate TT R. A. (2000) Decl. Delta r Elong. Phase Mag2010 08 02 01 04.50 -09 34.8 0.674 1.453 117.3 38.3 8.22010 08 07 01 13.35 -10 24.4 0.665 1.465 120.0 36.9 8.32010 08 12 01 21.02 -11 19.4 0.659 1.478 122.8 35.2 8.32010 08 17 01 27.41 -12 18.7 0.654 1.493 125.8 33.4 8.42010 08 22 01 32.49 -13 21.0 0.651 1.509 129.0 31.4 8.52010 08 27 01 36.22 -14 25.0 0.651 1.527 132.4 29.3 8.7 __________________

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Posts: 131433
Date:
 Permalink The magnitude 9.2 comet 10P/Tempel 2 will pass 0.05° from the magnitude 12.9 galaxy NGC 270, in the constellation Cetus, at 3:00 UT, 26th July, 2010. __________________

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Posts: 131433
Date:
 Permalink The magnitude 9.2 comet 10P/Tempel 2 will pass 0.55° from the magnitude 10.4 galaxy NGC 157, in the constellation Cetus, at 9:00 UT, 19th July, 2010. __________________
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