47

1927 U. T. RA. 1927.0 Dec. 1927.0 lo@// Mag. C o m e t 1927 d (Stearns).

Marchz7.0411~ 15h gmzzS27 - 1~43'20110 9.250~0.826 11

Central condensation about 16" d a m . Merion.

C o m e t 1927e (Grigg-SKjelZer?~p Periodic Comet) Marchz7.865 5 46 59 - 4 o

28.876 5 48 11 - 3 43 Very faint and diffuse, about 4' in diam. Integrated magnitude

5498

about- 1 2 (or brighter) after allowing 3 magnitudes for the area over which the image was spread. Accurate measures of the positions were not possible. (Expos. ih and 1 ~ 4 0 ~ respec- tively.) Hargreaves and Merton.

With the exception of the Pons-Winnecke photograph, all the plates were taken with aero-lenses of 20-inches focal length, at about F/s+.

Greenwich, 1927 April 5 . G. Merion.

48

oh Weltzeit a Vera 6 Vera 1ogn 1927 MHrzz5 14h18~36?48 -6" 5' 816 0.10~155

29 1 7 8.10 - 5 46 56.5 0.094280 27 1 7 55.63 - 5 56 12.4 0.098097

31 16 '4.15 - 5 37 23.5 0.090721 April 2 15 14.11 - 5 27 36.3 0.087438

4 14 8.37 - 5 17 38.2 0.084446 6 1 2 57.37 - 5 7 32.9 0.081759 8 1 1 41.60 -4 57 23.9 0.079388

10 10 21.56 - 4 47 15.0 0.077343 I 2 8 57.78 - 4 37 9.9 0.075632

16 6 1.20 -4 1 7 25,4 0.073243 18 14 4 29.53 -4 7 53.4 0:072575

74 7 30.81 -4 27 1 2 . 1 0.074264

oh Wcltzeit CL Vera d Vera 10ga 1927 April 2 0 1 4 ~ 2m56?4r -3'58'39116 0.072261

24 13 59 48.15 - 3 41 20.3 0.072704 2 2 I4 I 22.41 -3 49 47.4 0.072304

26 58 14.24 - 3 33 2 1 . 5 0.073459 28 56 41.30 - 3 25 54.1 0.074566 30 5 5 9.95 - 3 19 1.3 0.076020

Mai 2 53 40.82 - 3 1 2 46.0 0.077815 4 5 2 14.50 - 3 7 10.9 0.079942 6 50 51.55 - 3 2 18.1 0.082388 8 49 32.48 - 2 58 9.7 0.085142

I Z 13 47 7.77 - 2 5 2 11.1 0.091515 I 0 48 17.75 - 2 54 47.0 0.088189

GroBe 11m2.

Die folgenden Helligkeitsvergleichungen bildcn die Fortsetzung zu den im Rande 224 der A. X. mitgeteilten Dusseldorfer Beobachtungen.

1925 M. Z.Gr. Schatzungen Gr. Sept. I 2 11h5ym L 5 v, v nur soeben zu erk. I I rm4

2 1 11 18 hzv,g3v,unmittelbarv=11m1 11.0

8 1 1 13 d 7 u , v o f , v o e 1 0 . 2

Okt. 6 8 59 d 6 v , v o f , v o e 10. I

1 5 10.1

30 8 13 a 5 v, v o d, heller Mondschein 9.6 a I v, v 4 d, v 4 c, v 8 6 9.0

16 . 1 1 15 v z a , v 7 d , n 6 v , m 3 v , v 6 c 8.9 18 9 59 v 8 d , v 3 a , m 5 v , n 6 v 8.9 26 7 o v 2 a , v 7 d , v o m , n 3 v 8.8

6 7 20 a 3 v , v z d , c r v , v 3 b 9.4 15 6 5 5 a8v, 6321, L ~ V , v 3 f, vob, v3e 9.8

8 26 v o f , e I v, c 5 v, b 5 v, dunstig

Nov. 10 6 24

Dez. 4 6 38 a 3 v , v 3 d , v g c 9.2

1926 M. %. Gr. Schiitzungen Gr. Sept. 13 10h27m h 5 v, v a n der Grenze der Sicht-

barkeit 11m5 1 I?+

Okt. 2 9 37 v o f , v o e , d g v , b 4 v 10. I

5 11 49 d 3 v , c 5 v , v I . f , 6 3 v , v 3 e 9.9 8 9 39 d 4 v , c 3 v , v 3 f , b 3 v 9.9

26 8 20 a 3 v , v 3 d , v 5 c , v 3 6 9.2 - 13 8 18 d o v , a 5 v , c 2 v , v 5 f , v o b , v 4 e 9.6

Nov. I 7 55 v 7 d, v 2 a, m 5 71, It 5 v, v 5 c 9.0 9 7 41 v 4 a, Luft sehr schlecht 8.6

10 8 35 v 5 a, m I v, v o n, halbheiter 8.6 2 1 v 5 a, m I v, v o n, Mondschein,

Luft gut 8.6 Dez. 3 7 42 voa, vgd, in einer Wolkenluckc 9.1

24 7 o d 5 v , v o f , e 2 v , b 6 v , c 5 ~ 10.1

W. Luther.

7 43

6 9 1 1 v o a, sehr dunstig 9.0

Diisseldorf, 1927 Jan. 6.

A variable star in Hercules (28.1927 Herculis). RA. i7h53mqs, Decl. + ~ 9 ~ 4 7 1 2 (1900.0). On proper-motion plates of Kapteyn Area No. 62, Mr:H. G. ScoitBarrett, Second Assistant at the RadclitTe Observatory, has found a star showing considerable variation in brightness. The star has been identified as No. 294 in the D. M. of the Selected Areas (Harvard Annals 101.164), where it appears with the magnitude 16.4, the date of the observation being 1912 June 9. The Oxford photographs give the following results :

Date Int. Mag. Date Int. Mag. 1912”Ja:;e 21 ‘n:;?* ~ 1924 July 11 14.1 I 1925 June 9 13.3

The first of these obseivations is subject to some uncertainty as the star is at the limit of the plate, but it seems definitely brighter than 16m4.

Radcliffe Observatory, Oxford, 1927 April 13. H, Knox - Shaw. ~~

I n h a l t zu Nr. 5498. P. LucRey. Das Analemma des Ptolemlus. 17. - Mitteilungen uber Kometen. 45. - W. Luther. Oppositions- ephemeride fu r 288 Glauke. 47. - W. Luther. Beobachtungen des Veriinderlichen Z Ceti. 47. - H. Knox-Shaw. A variable star in Hercules. 47.

. - .~ ..

Mit Tnkl I . Ccrchlorrcu 1927 April 19. Hcrausgebcr : H . K o b o l d . Expedition: Kid , Moltkesrr. 80. Postschcck-Ronto Nr. 6238 Hamburg 1 1 .

Druck YOU C. Schaidt. lohahcr Gcorg Ohcim, Kicl.