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) P Q
n 0.0082384 Peri. 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) P Q
n 0.0082382 Peri. 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. Phase 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. Phase m1 m2
我是问这里的m1、m2是什么
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