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Table A.1

Collected observational material for the sample of 38 LPCs discovered during 1901–1950 (Cols. (4)–(7)).

O b s e r v a t i o n a l  m a t e r i a l M W 08
Comet qosc T Observational arc No. Data Heliocentric Observational arc No.
name dates of arc span distance span dates of
[AU] [yyyymmdd] [yyyymmdd–yyyymmdd] obs [yr] [AU] [yyyymmdd–yyyymmdd] obs
(1) (2) (3) (4) (5) (6) (7) (8) (9)

C/1902 R1 0.401 19021124 19020901–19030331 1491 0.58 1.79–2.44 19020901–19030331 1000
C/1902 X1 2.77 19030323 19021202–19030627 735 0.57 3.00–2.94 19021204–19030624 191
C/1903 M1 0.330 19030828 19030629–19031023 653 0.36 1.52–1.36 19030622–19031023 231
C/1904 Y1 1.88 19041103 19041218–19050502 post 164 0.37 1.96–2.86 19041218–19050502 48
C/1906 B1 1.30 19051222 19050723–19060425 post+ 267 0.76 2.50–2.18 19050723–19060424 186*
C/1906 E1 3.35 19051018 19040110–19070704** post+ 462 3.48 6.53–6.38 19040110–19070704 500
C/1907 E1 2.05 19070319 19070309–19080226 178 0.97 2.05–4.29 19070309–19080226 67
C/1911 S3 0.303 19111010 19110929–191202171 162 0.38 0.46–2.55 19110930–19120217 66
C/1912 R1 0.716 19121005 19120911–191305262 935 0.71 0.86–3.59 19120910–19130526 170
C/1913 Y1 1.10 19141026 19131218–191509073 1006 1.72 4.24–4.26 19131218–19150907 339
C/1914 F1 1.20 19140604 19140330–19141214 285 0.48 1.57–2.94 19140330–19141214 62
C/1914 M1 3.75 19140730 19140624–191508104 70 1.13 3.76–4.96 19140628–19150715 39
C/1916 G1 1.69 19170617 19160407–19180129 471 1.81 5.16–5.74 19160404–19180129 186
C/1919 Q2 1.12 19191207 19190825–19200203 276 0.44 1.95–1.75 19190825–19200203 87
C/1921 E1 1.01 19210510 19210315–19211126 568 0.70 1.74–2.25 19210315–19211126 146
C/1922 U1 2.26 19221026 19221022–19240128 post+ 482 1.27 2.26–5.22 19221022–19240128 185
C/1925 F1 4.18 19250906 19250323–192703045 262 1.95 4.41–6.07 19250323–19270304 59
C/1925 G1 1.11 19250401 19250405–192605026 post 598 1.07 1.11–5.15 19250405–19260502 201
C/1925 W1 1.57 19251002 19251117–192606107 post 342 0.56 1.57–3.47 19251117–19260531 129
C/1932 M1 1.65 19320924 19320621–193301208 187 0.58 2.06–2.25 19320621–19321230 48
C/1932 M2 2.31 19320921 19310814–19340719 328 2.93 4.78–6.83 19310814–19340719 161
C/1935 Q1 4.04 19360511 19350703–193711129 131 2.30 4.83–6.06 19350703–19371110 107
C/1937 C1 1.73 19370620 19370204–19371028 417 0.72 2.44–2.40 19370204–19371028 136
C/1937 N1 0.863 19370815 19370704–19371230 413 0.49 1.14–2.36 19370704–19371230 212
C/1940 R2 0.368 19410116 19400825–19410401*** 370 2.71–1.67 19400919–19410617 189
C/1940 S1 1.06 19400815 19401004–1941010310 post 36 0.25 1.34–2.37 19401004–19410102 19
C/1941 K1 0.875 19410903 19410604–19420218 461 0.71 1.76–2.74 19410604–19420218 318
C/1942 C1 1.44 19420430 19411228–19430108 224 1.03 2.22–3.51 19411228–19430108 228
C/1942 C2 4.11 19420927 19420212–1943031111 47 1.07 4.53–4.35 19420212–19430309 35
C/1944 K2 2.23 19440717 19440601–19450811 36 1.19 2.29–4.66 19440601–19450811 25
C/1946 C1 1.72 19460413 19460129–1947080912 485 1.52 1.97–5.56 19460202–19470809 183
C/1946 P1 1.14 19461026 19460813–1948112313 144 2.28 1.62–8.17 19460816–19481123 101
C/1946 U1 2.41 19470207 19461102–19481002 141 1.92 2.64–6.32 19461102–19481002 97
C/1947 S1 0.748 19480216 19470928–19490206 325 1.36 2.45–4.89 19470928–19490206 123
C/1947 Y1 1.50 19480216 19480118–19481130 124 0.87 1.59–3.85 19480118–19481130 78
C/1948 E1 2.11 19480515 19480313–19500209 247 1.91 2.36–6.65 19480313–19500209 95
C/1948 T1 3.26 19470904 19481007–19500817 post 26 1.86 4.89–9.38 19481007–19500817 26
C/1950 K1 2.57 19510115 19500527–19530119 254 2.65 3.53–7.26 19500527–19530119 38

Notes. The sample includes all comets that in MW08 have 1 /aori< 130 × 10-6 AU-1 and orbits of first- or second-class. Columns (2)–(4) show the osculating perihelion distance, perihelion time, and interval of collected data. The data distribution relative to perihelion passage is shown by additional descriptions: “post” in Col. (4) when all observations were taken after perihelion passage, and “post+” when the number of data taken after perihelion passage dominate. Columns (8)–(9) describe the positional data that formed the basis for determining the orbits presented in MW08. Comets with detectable NG effects are indicated here by rows in light grey shading (see also Table C.1). Notes to cases where we found in literature observations outside the data interval given in MW08 (in Col. (8) of this table):

(1)

One observation of poor quality was taken on 1911 September 29. Although a hundred times less weight in comparison to good-quality observations was applied, this measurement was rejected in the selecting and weighting.

(2)

One observation was taken on 1912 May 09, two in 1912 September 09, but all three were rejected as incorrect; a single observation from 1912 September 10 was also rejected.

(3)

Three observations taken on 1913 October 25, 26, and 31 are outliers.

(4)

One observation taken on 1914 June 24 (well fitted in right ascension and declination) and two observations taken on 1915 August 10 (only in declination) were also used here to determine the orbit.

(5)

Two observations were taken on 1925 March 22, but were rejected as outliers.

(6)

One observation was taken on 1925 April 05 and was included in the orbit determination only in right ascension.

(7)

Two observations were taken on 1926 June 09 and 10 and were included in the orbit determination only in right ascension and declination, respectively.

(8)

One observation taken on 1933 January 20 was included in the orbit determination in declination.

(9)

One observation taken on 1937 November 12 was included in declination in the orbit determination.

(10)

Three observations were taken on 1941 January 03 – these were included in the orbit determination only in right ascension.

(11)

Two observations were taken on 1943 March 11 and were included.

(12)

One observation taken on 1946 January 29 was included.

(13)

Two observations were taken on 1946 August 13; the first was included only in declination, and the second in both coordinates. Other notes

(*)

This is the unique case where a large set of observations is available at IAU Minor Planet Center Database. There are 239 positional observations, two of which are prediscovery observations found by Gary W. Kronk; they extend the data interval by about six months (see also Sect. 2).

(**)

Before perihelion only two observations were taken on 1904 January 10 and 1905 January 15.

(***)

Our data interval is significantly shorter than in MW08. Data after 1941 April 01 are needed.

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