有时候在看天空，会发现一个小小的亮点在移动，速度比较慢，方向固定，想想是什么呢，可能是飞机，怎么会飞那么高呢？想了很久也没找到答案。今天用一个星图软件starry night，看看今天晚上的星空怎么样，无意间发现一个移到的小亮点，和前几次看到的有些相似，于是点上去看了下详细的信息，软件马上显示出一个名字ERBS，是一颗人造卫星。在晚上20：06分时在天狼星的东侧升起，导出一个数据看看：
Ephemeris data for ERBS
Local Time
Az
Alt
RA
Dec
Constellation
Distance(KM)
20:06:15
224
7
7h 13.630m
-27?54.165'
Canis Major
1946
20:06:25
224
8
7h 15.911m
-27?9.481'
Canis Major
1879
20:06:35
224
9
7h 18.263m
-26?22.500'
Canis Major
1812
20:06:45
224
10
7h 20.695m
-25?32.966'
Canis Major
1745
20:06:55
224
11
7h 23.215m
-24?40.584'
Canis Major
1678
20:07:05
224
12
7h 25.834m
-23?45.012'
Canis Major
1612
20:07:15
225
13
7h 28.566m
-22?45.853'
Puppis
1545
20:07:25
225
14
7h 31.424m
-21?42.646'
Puppis
1479
20:07:35
225
15
7h 34.425m
-20?34.851'
Puppis
1414
20:07:45
225
17
7h 37.589m
-19?21.830'
Puppis
1349
20:07:55
225
18
7h 40.938m
-18?2.835'
Puppis
1284
20:08:05
225
20
7h 44.501m
-16?36.976'
Puppis
1220
20:08:15
225
22
7h 48.310m
-15?3.196'
Puppis
1157
20:08:25
226
24
7h 52.405m
-13?20.239'
Puppis
1095
20:08:35
226
26
7h 56.832m
-11?26.604'
Puppis
1033
20:08:45
226
28
8h 1.651m
-9?20.502'
Monoceros
973
20:08:55
226
31
8h 6.932m
-6?59.811'
Monoceros
914
20:09:05
227
34
8h 12.766m
-4?22.035'
Hydra
857
20:09:15
227
37
8h 19.265m
-1?24.285'
Hydra
802
20:09:25
228
41
8h 26.570m
1?56.683'
Hydra
750
20:09:35
228
45
8h 34.867m
5?44.328'
Hydra
700
20:09:45
229
50
8h 44.391m
10?1.986'
Cancer
655
20:09:55
231
55
8h 55.454m
14?52.221'
Cancer
614
20:10:05
233
61
9h 8.465m
20?15.754'
Cancer
580
20:10:15
236
68
9h 23.963m
26?9.937'
Leo
552
20:10:25
243
75
9h 42.650m
32?27.056'
Leo
532
20:10:35
265
81
10h 5.412m
38?53.124'
Leo Minor
520
20:10:45
341
83
10h 33.278m
45?8.135'
Ursa Major
519
20:10:55
19
77
11h 7.231m
50?48.406'
Ursa Major
526
20:11:05
29
70
11h 47.720m
55?30.788'
Ursa Major
543
20:11:15
33
63
12h 33.876m
58?57.915'
Ursa Major
569
20:11:25
36
57
13h 22.956m
61?3.169'
Ursa Major
601
20:11:35
37
51
14h 10.959m
61?52.868'
Ursa Major
640
20:11:45
38
46
14h 54.366m
61?43.138'
Draco
683
20:11:55
39
42
15h 31.430m
60?53.112'
Draco
731
20:12:05
40
38
16h 2.071m
59?39.317'
Draco
783
20:12:15
40
35
16h 27.100m
58?13.601'
Draco
837
20:12:25
40
32
16h 47.561m
56?43.526'
Draco
893
20:12:35
41
29
17h 4.422m
55?13.554'
Draco
951
20:12:45
41
27
17h 18.471m
53?46.135'
Draco
1011
20:12:55
41
24
17h 30.322m
52?22.498'
Draco
1072
20:13:05
41
22
17h 40.442m
51?3.153'
Draco
1134
20:13:15
42
21
17h 49.186m
49?48.202'
Hercules
1197
20:13:25
42
19
17h 56.823m
48?37.523'
Hercules
1261
20:13:35
42
17
18h 3.561m
47?30.879'
Hercules
1325
20:13:45
42
16
18h 9.559m
46?27.986'
Hercules
1390
20:13:55
42
15
18h 14.945m
45?28.540'
Lyra
1455
20:14:05
42
13
18h 19.818m
44?32.247'
Lyra
1521
20:14:15
42
12
18h 24.256m
43?38.825'
Lyra
1587
20:14:25
43
11
18h 28.325m
42?48.015'
Lyra
1654
20:14:35
43
10
18h 32.077m
41?59.578'
Lyra
1720
20:14:45
43
9
18h 35.554m
41?13.300'
Lyra
1787
20:14:55
43
8
18h 38.793m
40?28.985'
Lyra
1854
20:15:05
43
7
18h 41.823m
39?46.460'
Lyra
1921
20:15:15
43
7
18h 44.669m
39?5.566'
Lyra
1989
20:15:25
43
6
18h 47.352m
38?26.163'
Lyra
2056
20:15:35
43
5
18h 49.891m
37?48.125'
Lyra
2124
20:15:45
43
4
18h 52.301m
37?11.337'
Lyra
2191
20:15:55
43
4
18h 54.595m
36?35.697'
Lyra
2259
20:16:05
43
3
18h 56.785m
36?1.113'
Lyra
2327
20:16:15
43
2
18h 58.881m
35?27.502'
Lyra
2394
有了这个数据就可以在晚上的时候看看啦！ BackgroundThe ERBS satellite was deployed from the Space Shuttle Challenger in October 1984 by NASA Astronaut Sally Ride and later launched by the Shuttle "Challenger" crew into a 57 degree inclination precessing orbit with a period of approximately 72 days. In addition to the ERBE scanning and nonscanning instruments, the satellite also carried the Stratospheric Aerosol Gas Experiment (SAGE II). The ERBS was the first of three ERBE platforms which would eventually carry the ERBE Instruments. The second ERBE Instrument was aboard the NOAA-9 satellite when it was launched in January of 1985, and the third was aboard the NOAA-10 satellite when it was launched in October of 1986. Although the scanning instruments on board all three ERBE satellites have failed, the nonscanning instruments are all presently functioning.
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