SJAA

Ephemeris

Comet Comments

Don Machholz


Comet Linear (1998 T1) is in the morning sky while Comet Linear (1998 M5) fades in the evening sky.

The SOHO satellite found a new comet on images taken Feb. 6. Comet SOHO (C/1999 C1) was a Sungrazer seen only from space. Meanwhile the Lick Observatory Supernova Search found a new comet on March 17. Comet Li (1999 E1) remains faint and is dimming.

Comet Hunting Notes: Of the 79 comets visually discovered since 1975, 36 were found in the southern sky. These southern discoveries were not evenly spaced thoughout the year. Exactly half (18) of them took place in about three months-between Nov. 23 and Feb. 25. (During that same time only eight Northern Hemisphere finds occurred.) Good summer weather in the Southern Hemisphere does not account for all the finds; eight of those 18 discoveries were made by Northern Hemisphere comet hunters searching the southern skies. So when did Northern Hemisphere finds prevail? Between mid-March and mid-June, 11 of the 12 finds occurred in the northern sky.

Ephemerides

C/1998 M5 (LINEAR)
Date(00UT) R.A. (2000) Dec	El   Sky	Mag
04-07	08h09.3m	+67d21'	90d	E	9.6
04-12	08h14.3m	+62d51'	89d	E	9.7
04-17	08h19.1m	+58d38'	87d	E	9.9
04-22	08h23.9m	+54d41'	84d	E	10.1
04-27	08h28.7m	+51d02'	81d	E	10.2
05-02	08h33.5m	+47d39'	79d	E	10.4
05-07	08h38.2m	+44d31'	76d	E	10.6
05-12	08h43.0m	+41d37'	73d	E	10.7
05-17	08h47.8m	+38d55'	69d	E	10.9
05-22	08h52.5m	+36d25'	66d	E	11.1
05-27	08h57.2m	+34d06'	63d	E	11.2
06-01	09h02.0m	+31d55'	60d	E	11.4
06-06	09h06.7m	+29d53'	56d	E	11.6
06-11	09h11.3m	+27d57'	53d	E	11.7

C/1998 T1 (LINEAR)
Date(00UT) R.A. (2000) Dec	Ell  Sky	Mag
04-07	23h32.5m	-02d07'	24d	M	11.6
04-12	23h33.7m	-02d18'	29d	M	11.5
04-17	23h34.8m	-02d31'	33d	M	11.3
04-22	23h35.6m	-02d48'	38d	M	11.1
04-27	23h36.3m	-03d08'	43d	M	10.9
05-02	23h36.6m	-03d33'	48d	M	10.7
05-07	23h36.5m	-04d04'	53d	M	10.5
05-12	23h35.9m	-04d44'	58d	M	10.2
05-17	23h34.7m	-03d53'	64d	M	10.0
05-22	23h32.6m	-06d36'	69d	M	9.7
05-27	23h29.3m	-07d58'	76d	M	9.4
06-01	23h24.4m	-09d45'	82d	M	9.1
06-06	23h16.9m	-12d09'	90d	M	8.8
06-11	23h05.6m	-15d28'	98d	M	8.4

Elements

Object:	LINEAR (M5))
Peri. Date:		1999 01 24.5753
Peri. Dist (AU):	1.742203 AU
Arg/Peri (2000):	101.2881 deg.
Asc. Node (2000):	333.3762 deg.
Incl (2000):		082.2279 deg.
Eccen:			0.995988
Orbital Period:		9,000 years
Ref:			MPC 32866
Epoch:			1999 01 22
Absol. Mag/"n":		5.5/4.0

Object:	LINEAR (T1)
Peri. Date:		1999 06 25.2578
Peri. Dist (AU):	1.468118 AU
Arg/Peri (2000):	226.3361 deg.
Asc. Node (2000):	153.3540 deg.
Incl (2000):		170.1601 deg.
Eccen:			0.99915
Orbital Period:		71,000 years
Ref:			MPC 33451
Epoch:			1999 01 22
Absol. Mag/"n":		6.8/4.0
Don Machholz (530) 346-8963
DonM353259@aol.com.
Web Page: http://members.aol.com/cometcom/index.html


Don Machholz; last updated: October 04, 2007 Prev Next