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Table A.1

Small-perihelion Oort spike comets discovered in 1885–1900 and 1951–2012 and only with pure gravitational orbits determinable.

Comet qosc T Observational arc No. Data Heliocentric Data Q* New rms [arcsec] Ref Data 1∕aori 1∕afut
name dates of arc span distance span type GR model orbital /no of and selec [10−6au−1]
[au] [yyyymmdd] [yyyymmdd–yyyymmdd] obs [yr] [au] class res. Notes tion
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]
C/1886 T1 0.663 a5 18861216 18861007–18870617 320 0.693 1.50–3.01 full 6.0 2a 3.80/546 new STD 50.5 ± 20.4 15.2 ± 20.4
Barnard-Hartwig –18870531 62 0.646 1.50–2.80 GR 1B MPC 46.2 10.8
C/1890 F1 1.908 z6 18900602 18900322–18920205 908 1.87 2.10 6.56 full 7.5 1a 2.61/1644 PB STD 54.37± 3.42 93.71± 3.71
Brooks 899 GR MPC 89.36 125.71
C/1966 T1 0.419 a1 19670120 19661017–19670208 50 0.312 1.49–0.628 pre+ 5.5 2a 1.68/ 97 new STD 88.3 ± 37.0 −850.3± 37.0
Rudnicki 46 GR 2A MPC 49.2 −889.9

Notes. The observational material for the determination of osculating orbits is described in Cols. [4]−[8] and [11], and Col. [9] gives Q* (see KD13) for the GR model of motion, and the resulting orbit quality assessment (orbital class) is given in Col. [10]. The second and third columns show an osculating perihelion distance and perihelion time. The data distribution relative to a perihelion passage is presented in Cols. [7] and [8], where “pre” (“post”) means that all observations were taken before (after) the perihelion passage; “pre+” (“post+”) means that considerablymore pre-perihelion (post-perihelion) measurements were available, and additional “+” means a drastic dominance of data before (after) perihelion. Column [12] shows references, where “new” means solutions obtained here, MPC – taken from the Minor Planet Center https://www.minorplanetcenter.net/db_search, NK – Nakano Notes, PB – Królikowska & Dybczyński (2016). Values of 1∕aori and 1∕afut represent original and future semimajor axes of barycentric orbits at the distance of 250 au before entering and after leaving the inner part of the Solar System, respectively. The full table is available at the CDS.

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