Comet 103P/HARTLEY 2 [1997/1998]

Oct. 26.34: m1 = 12.0 (+/-0.2) Dia. 2', DC = 2, 84x256 L, Makaki.(HI)

Nov. 02.3 m1 = 11.3 (+/-0.2) Dia. 4', DC = 4, 42x256 L, Dillin.(HI)

Nov. 23.28: m1 = 9.4 (+/-0.3) Dia. 5', DC = 3, 42x256 L, Silva (HI)

Nov. 23.30: m1 = 9.2 (+/-0.2) Dia. 5', DC = 4, 7x 50 B, Silva (HI)

Nov. 30.27: m1 = 9.2 (+/-0.3) Dia. 5', DC = 4, 42x256 L, Dilli. (HI)

Nov. 30.25: m1 = 8.9 (+/-0.3) Dia. 7', DC = 4, 7x 50 B, Dilli. (HI)

Dec. 18.23: m1 = 9.0 (+/-0.1) Dia.3.5', DC = 4, 42x256 L, Honol. (HI)

Dec. 20.25: m1 = 8.8 (+/-0.1) Dia. 4', DC = 3, 42x256 L, Honol. (HI)

Dec. 22.25: m1 = 8.6 (+/-0.2) Dia. 4', DC = 4, 42x256 L, Koko-H. (HI)

Dec. 22.24: m1 = 8.5 (+/-0.2) Dia. 6', DC = 3, 7x 50 B, Koko-H. (HI)

Dec. 25.24: m1 = 8.6 (+/-0.2) Dia. 5', DC = 5, 42x256 L, Koko-H. (HI)

Dec. 25.24: m1 = 8.3 (+/-0.2) Dia. 6', DC = 5, 7x 50 B, Koko-H. (HI)

Dec. 25.24: Tail 6' PA = 40, 42x256 L, Koko-H. (HI)

Dec. 27.29: m1 = 8.4 (+/-0.2) Dia. 7', DC = 5, 7x 50 B, Silva (HI)

Dec. 27.30: m1 = 8.6 (+/-0.1) Dia. 5', DC = 5, 42x256 L, Silva (HI)

Dec. 27.31: Tail 6' PA = 70, 169x256 L, Silva (HI)

Dec. 28.24: m1 = 8.4 (+/-0.2) Dia. 6', DC = 5, 7x 50 B, Dilli. (HI)

Dec. 28.25: m1 = 8.6 (+/-0.1) Dia. 5', DC = 5, 42x256 L, Dilli. (HI)

Dec. 28.25: Tail 7-8' PA = 50, 42x256 L, Dilli. (HI)

Jan. 01.26: m1 = 8.4 (+/-0.1) Dia. 5', DC = 5, 7x 50 B, Koko-H. (HI)

Jan. 01.26: Tail 6-7' PA = 70, 42x256 L, Koko-H. (HI)

Jan. 15.23: m1 = 8.7 (+/-0.1) Dia. 5', DC = 5, 7x 50 B, Koko-H. (HI)

Jan. 15.23: m1 = 8.9 (+/-0.2) Dia. 4', DC = 5, 42x256 L, Koko-H. (HI)

Jan. 15.22: Tail 6' PA = 70, 42x256 L, Koko-H. (HI)

Jan. 17.30: m1 = 8.5 (+/-0.2) Dia. 5', DC = 5, 7x 50 B, Koko-H. (HI)

Jan. 17.25: m1 = 8.9 (+/-0.2) Dia. 4', DC = 6, 42x256 L, Koko-H. (HI)

Jan. 17.26: Tail 5' PA = 70, 169x256 L, Koko-H. (HI)

Jan. 19.26: m1 = 8.9 (+/-0.3) Dia. 4', DC = 5, 7x 50 B, Koko-H. (HI)

Jan. 19.32: m1 = 8.8 (+/-0.1) Dia. 3', DC = 6, 42x256 L, Koko-H. (HI)

Jan. 20.37: m1 = 8.4 (+/-0.2) Dia. 5', DC = 5, 7x 50 B, Silva (HI)

Jan. 20.38: m1 = 8.7 (+/-0.2) Dia. 4', DC = 6, 42x256 L, Silva (HI)

Jan. 21.26: m1 = 8.5 (+/-0.2) Dia. 4', DC = 5, 7x 50 B, Koko-H. (HI)

Jan. 21.27: m1 = 8.9 (+/-0.1) Dia. 3', DC = 6, 42x256 L, Koko-H. (HI)

Jan. 22.28: m1 = 8.8 (+/-0.2) Dia. 4', DC = 5, 7x 50 B, Koko-H. (HI)

Jan. 22.29: m1 = 9.1 (+/-0.1) Dia. 3', DC = 5, 42x256 L, Koko-H. (HI)

Feb. 14.25: m1 = 9.4 (+/-0.2) Dia. 4', DC = 3, 7x 50 B, Koko-H. (HI)

Feb. 14.24: m1 = 9.5 (+/-0.1) Dia. 3', DC = 4, 42x256 L, Koko-H. (HI)

Feb. 15.29: m1 = 9.8 (+/-0.1) Dia. 3', DC = 3, 42x256 L, Koko-H. (HI)

Feb. 17.30: m1 = 9.7 (+/-0.2) Dia. 4', DC = 3, 7x 50 B, Silva (HI)

Feb. 17.28: m1 = 10.1 (+/-0.2) Dia.4.5', DC = 3, 42x256 L, Silva (HI)

Feb. 18.29: m1 = 10.3 (+/-0.1) Dia. 3', DC = 2, 42x256 L, Koko-H. (HI)

Feb. 21.29: m1 = 10.5 (+/-0.1) Dia. 3', DC = 3, 42x256 L, Koko-H. (HI)

Feb. 22.31: m1 = 9.9 (+/-0.2) Dia. 4', DC = 3, 42x256 L, Silva (HI)

Feb. 24.28: m1 = 10.6 (+/-0.2) Dia. 4', DC = 3, 42x256 L, Silva (HI)

Feb. 27.29: m1 = 10.9 (+/-0.3) Dia.2.5', DC = 2, 42x256 L, Koko-H. (HI)

Feb. 28.25: m1 = 11.1 (+/-0.3) Dia. 3', DC = 2, 42x256 L, Silva (HI)

Mar. 01.26: m1 = 10.8 (+/-0.2) Dia. 3', DC = 2, 42x256 L, Dilli. (HI)

Mar. 15.26: m1 = 10.9 (+/-0.2) Dia. 2', DC = 2, 42x256 L, Koko-H. (HI)

Mar. 16.26: m1 = 11.2 (+/-0.2) Dia.2.5', DC = 1, 42x256 L, Silva (HI)

Mar. 18.32: m1 = 11.5 (+/-0.2) Dia. 2', DC = 2, 42x256 L, Silva (HI)

Mar. 20.26: m1 = 11.7 (+/-0.2) Dia. 2', DC = 2, 42x256 L, Koko-H. (HI)

Apr. 21.31: m1 > 13 (Dia. 1'), 169x256 L, Koko-H. (HI)

Apr. 25.28: m1 > 13 (Dia. 1'), 169x256 L, Silva (HI)

Apr. 26.27: m1 = 13.9:(+/-0.3) Dia.0.6', DC = 1, 169x256 L, Dilli. (HI)

Feb. 17.29: m2 = 14.4 (+/-0.2), 169x256 L, Silva (HI)

Comments: A very steep brightening from mid-october to mid-november (n around 13 for that month, instead of the usual 4 value), as did 6P/d'Arrest in July 1995; still rather diffuse and now visible to binoculars. [Oct.26 m1 corrected with Tycho catalog] Brighter under darker skies... Dec. 17-22. Dec. 25-28: Faint, narrow tail. Dec. 28: Jets in PA 20 and 350. Jan. 17: Fan or Jets in PA 270 and 330. Feb. 14-15: still elongated P.A. 70, but seems to fade rapidly, becoming more diffuse, too.

Images:

[92 K] 30.26 Nov. 1997: Drawing at 169x /42x (25.6cm L)
[119 K] 28.25 Dec. 1997: Drawing at 169x /42x (25.6cm L)
[119 K] 17.29 Jan. 1998: Drawing at 169x (25.6cm L)

Comet 103P/HARTLEY 2 [2010]

Aug. 06.97: m1 = 13.4 (+/-0.2) Dia. 1.0', DC = 2, 135x407 L, Valdrome (F-26)

Aug. 07.11: m1 = 12.9 (+/-0.3) Dia. 1.6', DC = 2, 135x407 L, Valdrome (F-26)

Aug. 07.99: m1 = 13.2 (+/-0.2) Dia. 1.4', DC = 3, 135x407 L, Valdrome (F-26)

Aug. 08.91: m1 = 12.8 (+/-0.2) Dia. 1.5', DC = 2, 135x407 L, Valdrome (F-26)

Aug. 10.12: m1 = 12.7 (+/-0.2) Dia. 1.5', DC = 2, 135x407 L, Valdrome (F-26)

Aug. 11.08: m1 = 12.3 (+/-0.2) Dia. 1.8', DC = 3, 135x407 L, Valdrome (F-26)

Aug. 12.00: m1 = 12.3 (+/-0.2) Dia. 1.8', DC = 2, 58x407 L, Valdrome (F-26)

Aug. 12.01: m1 = 12.4 (+/-0.2) Dia. 1.3', DC = 2, 135x407 L, Valdrome (F-26)

Aug. 16.03: m1 = 12.3 (+/-0.2) Dia. 2.0', DC = 3, 58x407 L, Valdrome (F-26)

Aug. 16.04: m1 = 12.6 (+/-0.2) Dia. 1.5', DC = 3, 135x407 L, Valdrome (F-26)

Sep. 09.93: m1 = 9.7 (+/-0.2) Dia. 5', DC = 3, 58x407 L, Ambeyrac (F-12)

Sep. 10.84: m1 = 10.0 (+/-0.1) Dia. 6', DC = 3, 58x407 L, Ambeyrac (F-12)

Sep. 11.92: m1 = 10.0 (+/-0.1) Dia. 7', DC = 3, 58x407 L, Ambeyrac (F-12)