177P/Barnard

最近国外观测亮度到9等左右，可以尝试观测一下：


177P/Barnard
Orbital Elements
The following orbital elements are taken from MPC 57134:
177P/Barnard
Epoch 2006 Aug. 13.0 TT = JDT 2453960.5
T 2006 Aug. 28.6884 TT                                  MPC
q   1.107215             (2000.0)           &nbsp               Q
n   0.0082384     &nbsperi.   60.4608      +0.7613389      +0.3899870
a  24.279480       Node   272.0664      -0.6067923      +0.7100140
e   0.954397       Incl.   31.2175      +0.2283992      +0.5863362
P 120
From 187 observations 1889-2006, mean residual 0".7.

Elements are also available for the current standard epoch:
177P/Barnard
Epoch 2006 Sept. 22.0 TT = JDT 2454000.5
T 2006 Aug. 28.6889 TT                                  MPC
q   1.107215             (2000.0)           &nbsp               Q
n   0.0082382     &nbsperi.   60.4619      +0.7613425      +0.3899827
a  24.279907       Node   272.0658      -0.6067855      +0.7100222
e   0.954398       Incl.   31.2173      +0.2284054      +0.5863292
P 120

An explanation of the orbital elements is available.
These orbital elements are also available in forms suitable for loading into a number of popular planetarium-type software programs.



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Ephemeris
The following ephemeris is at intervals of five days. A daily ephemeris covering the same time interval is also available.
Personalized ephemerides for this (and other) objects may be generated using the Minor Planet & Comet Ephemeris Service.


  Date      TT      R. A. (2000)   Decl.      Delta      r    Elong. &nbsphase      m1    m2
WARNING!
This comet gets close to the sun during the period covered
in the ephemeris below.  Observers are warned to be wary
of observing comets near the sun.  NEVER point any kind of
optical instrument at the sun--instant blindness will be
the probable result.

2006 07 14    17 11.52   +00 45.8    0.371    1.319   138.9    30.4  14.1
2006 07 19    17 05.14   +09 02.2    0.366    1.279   129.1    38.0  13.9
2006 07 24    16 59.86   +17 04.8    0.370    1.243   120.0    45.1  13.8
2006 07 29    16 55.86   +24 33.4    0.381    1.209   111.8    51.2  13.7
2006 08 03    16 53.23   +31 17.7    0.397    1.180   104.8    56.3  13.7
2006 08 08    16 51.97   +37 15.8    0.417    1.155    99.0    60.1  13.7
2006 08 13    16 52.07   +42 30.9    0.439    1.135    94.5    62.9  13.8
2006 08 18    16 53.52   +47 08.0    0.462    1.120    91.0    64.6  13.8
2006 08 23    16 56.39   +51 12.9    0.486    1.111    88.5    65.5  13.9
2006 08 28    17 00.82   +54 51.0    0.510    1.107    87.0    65.7  14.0
2006 09 02    17 07.04   +58 07.1    0.532    1.109    86.2    65.2  14.1
2006 09 07    17 15.38   +61 04.7    0.553    1.117    86.2    64.2  14.2
2006 09 12    17 26.34   +63 45.9    0.573    1.130    86.8    62.8  14.3
2006 09 17    17 40.67   +66 11.9    0.591    1.149    88.1    61.0  14.5
2006 09 22    17 59.39   +68 22.5    0.608    1.173    89.9    58.9  14.6
2006 09 27    18 23.65   +70 16.1    0.623    1.201    92.2    56.5  14.8
2006 10 02    18 54.57   +71 48.4    0.637    1.233    95.0    54.0  14.9
2006 10 07    19 32.61   +72 52.8    0.651    1.269    98.2    51.2  15.1
2006 10 12    20 16.79   +73 20.6    0.665    1.308   101.8    48.3  15.3

呵呵~~似乎條件不是很好

呵呵~~似乎條件不是很好

光看星历表是不对的，这颗彗星比较活跃，亮度应该会亮于预报的，再加之今年P/2006 M3 (Barnard)在过近日点之前会距离地球0.35 AU处掠过，所以应该密切注视（http://ccn.lamost.org/wordpress/?p=30）。

m1和m2是什么？

C/2006 M1 (LINEAR)和C/2006 M2 (Spacewatch)
看这里：http://ccn.lamost.org/wordpress/?p=28

今天收到：
177P/Barnard:
2006 July 22.99 UT: m1=8.5, Dia.=12', DC=2, 7x50B.

( León, North Spain )
有条件的快观测吧！

上张路径图……

suhuasky不已经发了么？

各位同好，抓紧时间观测吧！
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 22  17  1.84   13 55.0   0.367   1.257   123    8.7  21:01 (  0, 70)  
July 29  16 55.87  24 33.5   0.381   1.209   111    8.4  20:43 ( 21, 80)

Date      TT      R. A. (2000)   Decl.      Delta      r    Elong. &nbsphase      m1    m2

我是问这里的m1、m2是什么