SJAA

Ephemeris

Comet Comments

Don Machholz


Comet LINEAR (1998 M5) fades in our evening sky as it pulls away from both us and the sun. Periodic Comet Jager is also dimming in our evening sky. It will be back in 15 years. Meanwhile, Comet LINEAR (1998 T1), discovered late last year, emerges from behind the sun and into our morning sky.

Comet Hunting Notes: Of the 79 visual comet discoveries since 1975, 30 (38%) have been made in the first half of the year, with 49 finds in the second half. Subdividing the year into quarters, the first quarter has 18 discoveries, the second has 12, the third has 26 and the last three months of the year yields 23 finds.

Ephemerides

C/1998 M5 (LINEAR)
Date(00UT) R.A. (2000) 	Dec	Elong	Sky 	Mag
03-08	19h49.2m	+82d24'	90d	M	9.0
03-13	20h03.9m	+87d29'	92d	M	9.1
03-18	07h38.4m	+87d20'	92d	E	9.1 
03-23	07h52.5m	+82d09'	93d	E	9.2 
03-28	07h58.9m	+77d03'	92d	E	9.3 
04-02	08h04.3m	+72d05'	92d	E	9.5 
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

P/1998 U3 (Jager)
Date(00UT) R.A. (2000) 	Dec	Elong	Sky 	Mag 
03-08	06h34.1m	+23d11'	111d	E	10.8 
03-13	06h39.2m	+22d14'	107d	E	10.9 
03-18	06h45.0m	+21d19'	104d	E	11.0 
03-23	06h51.2m	+20d25'	100d	E	11.1 
03-28	06h57.9m	+19d33'	97d	E	11.1 
04-02	07h05.0m	+18d42'	94d	E	11.2 
04-07	07h12.4m	+17d52'	91d	E	11.3 
04-12	07h20.1m	+17d02'	87d	E	11.4 
04-17	07h28.1m	+16d12'	84d	E	11.5 
04-22	07h36.3m	+15d23'	82d	E	11.5 
04-27	07h44.7m	+14d33'	79d	E	11.6 
05-02	07h53.2m	+13d43'	76d	E	11.7 
05-07	08h01.9m	+12d52'	74d	E	11.8 
05-12	08h10.7m	+12d01'	71d	E	11.9

C/1998 T1 (LINEAR)
Date(00UT) R.A. (2000) 	Dec	Elong	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'	48d	M	10.2

Elements

Object:			Jager
Peri. Date:		1999 03 10.0607
Peri. Dist (AU):	2.133926 AU	
Arg/Peri (2000):	180.8903 deg.
Asc. Node (2000):	303.5430 deg.
Incl (2000):		019.1411 deg.
Eccen:			0.648175
Orbital Period:		14.9 years
Ref:			MPC 33650
Epoch:			1999 03 03
Absol. Mag/"n":		6.5/4.0

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

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
Don Machholz (530) 346-8963 Web Page: http://members.aol.com/cometcom/index.html DonM353259@aol.com.


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