C/1999 S4 (LINEAR)


Orbit by all observations
Orbit by 349's observations

Recent Image
C/1999 S4 on July 29
2000 July 29.49 UT
C/1999 S4 on July 30
2000 July 30.47 UT

Observations
June 07.75 UT(I-Band) m1=10.0, coma diameter=1'.1, 1'.7 tail in p.a. 280 deg.
June 07.74 UTm1=10.9, coma diameter=0'.65, 0'.7 tail in p.a. 280 deg.
June 06.75 UTm1=10.4, coma diameter=1'.0, 1'.3 tail in p.a. 279 deg.
June 04.75 UTm1=10.5, coma diameter=0'.85, 0'.9 tail in p.a. 281 deg.
June 01.76 UTm1=10.5, coma diameter=1'.3, 1'.3 tail in p.a. 274 deg.
May 29.75 UTm1=11.0, coma diameter=0'.85, 1'.0 tail in p.a. 278 deg.
May 24.75 UTm1=11.6, coma diameter=0'.75.
May 18.75 UTm1 about 11.6, coma diameter=0'.7.
May 14.76 UTThe comet cannot be seen. The spot for observation was shrouded in dense fog.
May 8.79 UTC/1999 S4 cannot be seen, because it was bad condition by the clouds at low altitude.
May 4.77 UTThe observation in the morning sky was successfully.
The unfiltered CCD magnitude was about 13.0, and the comet had a coma diameter of 0'.4.
Apr. 29.78 UTThe comet cannot be seen.
Apr. 28.79 UTC/1999 S4 cannot be found. 12 mag stars can be detected on images.

Images
2000 June 06.753 UT
2000 June 04.754 UT
2000 June 01.764 UT
2000 May. 29.753 UT
2000 May. 24.753 UT
2000 May. 18.749 UT
2000 May. 04.773 UT
2000 Mar. 25.427 UT
2000 Mar. 12.429 UT
2000 Feb. 20.425 UT
2000 Feb. 12.426 UT
2000 Feb. 05.395 UT
2000 Jan. 22.397 UT
2000 Jan. 08.451 UT

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