Solar System
Dynamics &
Planetology
Group 		C/1906 B1 Brooks



General description

data set of C/1906 B1

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Comet C/1906 B1 was discovered on 27 January 1906, over a month after perihelion passage, and was last seen on 25 April 1906. In 2005, G. Kronk identified a prediscovery observation of this comet performed by E.E. Barnard (Yerkes Observatory, Wisconsin, USA) on 23 July 1905 [Kronk, Cometography: Volume 3].

This comet made its closest approach to the Earth on 11 February 1906 (0.911 au), that is about two weeks after its discovery.

Solution given below is based on data span over 0.756 yr in a range of heliocentric distances from 2.496 au through perihelion (1.297 au) to 2.185 au.

Pure gravitational orbit determined from all available positional measurements (267 observations) give hyperbolic original barycentric orbit (2a-class orbit); also original orbit given in Minor Planet Center is hyperbolic (186 obs. used, the same arc of data; 1B-class orbit, see MPC).

It was possible to obtain the non-gravitational orbit for C/1906 B1, however, only radial non-gravitational parameter was determined. This NG solution give elliptical original barycentric orbit (see NG orbit given below).

Comet suffered rather small planetary perturbations during its passage through the planetary system, however, they led to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbit given for NG solution).

This comet was in the original sample of 19 comets used by Oort for his hypothesis on LPCs.

More details in Królikowska et al. 2014

Figure caption: Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line — the moment of perihelion passage.



Non–gravitational orbit — see below SSDP Cometary Note C1906B1N6-001

SSDP Cometary Note C1906B1A5-001

Comet C/1906 B1 Brooks

number of observations 267
number of residuals 450
data interval 1905 July 23 — 1906 Apr. 25
rms [arcsec] 3.07
orbit quality class 2a

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 19051221.0 = JD 2417200.5
time of perihelion passage (TT) 19051222.834099 ± 0.000635
perihelion distance 1.29656822 ± 0.00000329
eccentricity 1.00118940 ± 0.00002875
argument of perihelion [deg] 89.875094 ± 0.000333
longitude of the ascending node [deg] 287.700661 ± 0.000299
inclination [deg] 126.443151 ± 0.000191
inverse semimajor axis [10-6 au-1] -917.34 ± 22.17

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.



data set of C/1906 B1

Figure caption: Six 2D-projections of the 6D space of original swarm (5001 VCs) of C/1906 B1. Each density map is given in logarithmic scale presented on the right in the individual panel.
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Original orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT) 16081107
time of perihelion passage (TT) 19051222.176515 ± 0.000916
perihelion distance 1.29645026 ± 0.00000337
eccentricity 1.00017579 ± 0.00002976
argument of perihelion [deg] 89.834094 ± 0.000348
longitude of the ascending node [deg] 287.548057 ± 0.000302
inclination [deg] 126.511964 ± 0.000197
inverse semimajor axis [10-6 au-1] -135.59 ± 22.96

Note: Values of uncertainties of original/future orbital elements were derived using a swarm of 5001 osculating orbits of VCs (including the nominal osculating orbit given above) for original/future orbital evolution calclulations and then by fitting the distribution of a given orbital element of original/future swarm of VCs to Gaussian distribution.

Original barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here   (data format), i.e. before entering the planetary zone.



data set of C/1906 B1

Figure caption: Six 2D-projections of the 6D space of future swarm (5001 VCs) of C/1906 B1. Each density map is given in logarithmic scale presented on the right in the individual panel.
The same figure in the new window

Future orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT) 22000329
time of perihelion passage (TT) 19051224.093101 ± 0.000459
perihelion distance 1.28893207 ± 0.00000338
eccentricity 1.00051887 ± 0.00002960
argument of perihelion [deg] 89.763925 ± 0.000344
longitude of the ascending node [deg] 287.836952 ± 0.000313
inclination [deg] 126.593908 ± 0.000199
inverse semimajor axis [10-6 au-1] -402.56 ± 22.96


Future barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here   (data format), i.e. after leaving the planetary zone.



Non–gravitational orbit


SSDP Cometary Note C1906B1N6-001

number of observations 267
number of residuals 449
data interval 1905 July 23 — 1906 Apr. 25
rms [arcsec] 3.05
orbit quality class 2a

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 19051221.0 = JD 2417200.5
time of perihelion passage (TT) 19051222.827139 ± 0.001939
perihelion distance 1.29649411 ± 0.00001882
eccentricity 1.00071452 ± 0.00012808
argument of perihelion [deg] 89.873443 ± 0.000523
longitude of the ascending node [deg] 287.702585 ± 0.000592
inclination [deg] 126.443226 ± 0.000188
inverse semimajor axis [10-6 au-1] -551.12 ± 98.79

Nongravitational parameters [10-8 au/day2] A1 = 7.32320 ± 1.84110 A2 = 0.00000 ± 0.00000 A3 = 0.00000 ± 0.00000

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.



data set of C/1906 B1

Figure caption: Six 2D-projections of the 6D space of original swarm (5001 VCs) of C/1906 B1. Each density map is given in logarithmic scale presented on the right in the individual panel.
The same figure in the new window

Original orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT) 16060102
time of perihelion passage (TT) 19051222.173035 ± 0.001408
perihelion distance 1.29627992 ± 0.00004429
eccentricity 0.99984792 ± 0.00009573
argument of perihelion [deg] 89.843280 ± 0.002419
longitude of the ascending node [deg] 287.549903 ± 0.000595
inclination [deg] 126.512022 ± 0.000192
inverse semimajor axis [10-6 au-1] 117.32 ± 73.86

Note: Values of uncertainties of original/future orbital elements were derived using a swarm of 5001 osculating orbits of VCs (including the nominal osculating orbit given above) for original/future orbital evolution calclulations and then by fitting the distribution of a given orbital element of original/future swarm of VCs to Gaussian distribution.

Original barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here   (data format), i.e. before entering the planetary zone.



data set of C/1906 B1

Figure caption: Six 2D-projections of the 6D space of future swarm (5001 VCs) of C/1906 B1. Each density map is given in logarithmic scale presented on the right in the individual panel.
The same figure in the new window

Future orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT) 22021224
time of perihelion passage (TT) 19051224.081525 ± 0.003074
perihelion distance 1.28876275 ± 0.00004399
eccentricity 1.00019277 ± 0.00009521
argument of perihelion [deg] 89.750691 ± 0.003441
longitude of the ascending node [deg] 287.838945 ± 0.000635
inclination [deg] 126.593965 ± 0.000194
inverse semimajor axis [10-6 au-1] -149.58 ± 73.87


Future barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here   (data format), i.e. after leaving the planetary zone.





Solar System Dynamics & Planetology Group, 2014. All rights reserved

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