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RE: Comet 10P/Tempel 2
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Comet 10P/Tempel 2 makes its closest approach to the Earth (1.319 AU) in the constellation Bootes on the 24th May 2015

Ephemeris

Date    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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Comet 10P/Tempel 2 is at Opposition (1.415 AU) in the constellation Virgo on the 24th April 2015 

Ephemeris

Date    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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Comet 10P/Tempel
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Comet 10P/Tempel is at Opposition (3.276 AU) on the 26th February 2014

Ephemeris

Date    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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RE: Comet 10P/Tempel 2
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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.

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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.

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

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Comet 10P (Tempel) in the constellation Cetus, 3:12 UT, 10th August, 2010.

Magnitude=10.1mag
Best 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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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.

Ephemeris
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   Mag

2010 08 02 01 04.50 -09 34.8 0.674 1.453 117.3 38.3 8.2
2010 08 07 01 13.35 -10 24.4 0.665 1.465 120.0 36.9 8.3
2010 08 12 01 21.02 -11 19.4 0.659 1.478 122.8 35.2 8.3
2010 08 17 01 27.41 -12 18.7 0.654 1.493 125.8 33.4 8.4
2010 08 22 01 32.49 -13 21.0 0.651 1.509 129.0 31.4 8.5
2010 08 27 01 36.22 -14 25.0 0.651 1.527 132.4 29.3 8.7


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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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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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