C/1906 B1 (Brooks)

Metadata

Parameter Value
Designation C/1906 B1 (Brooks)
Type C
Perihelion (tp_cal, UTC) 1905-12-22T18:51:26.026560Z
Orbit solution date (soln_date, UTC) 2024-02-20T20:16:47Z
Obs used 158
NEO -
M1 7.000
K1 16.750
PC -
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 1906-02-22.0000000
e 0.99985360
q (au) 1.296232
a (au) 8853.993905
i (deg) 126.442402
Ω (om, deg) 287.708053
ω (w, deg) 89.843518
M (ma, deg) 0.000072

Magnitude

C/1906 B1 (Brooks) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (6.312 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 6.312
n 6.000
gf 1.000
gb -0.500
k 1.000
δ90 10.000
Parameter Symbol Range Description
Absolute magnitude at 1 AU from Sun and Earth H0 -5 to 20 Intrinsic brightness of the comet
Photometric slope parameter n 2 to 6 Rate of brightness change with heliocentric distance
Forward scattering asymmetry factor gf 0.8 to 1 Degree of forward scattering
Backward scattering asymmetry factor gb -1 to -0.5 Degree of backward scattering
Partitioning coefficient k 0.8 to 1 Ratio between forward/backward scattering contributions
Dust-to-gas brightness ratio δ90 1 to 10 Relative contribution of dust scattering to gas emission

Reference: EPSC-DPS2025-160

Ephemeris

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-05-12 00:00 03:30:00.46 -34:54:47.9 HIP 16493 29.29
2026-05-12 12:00 03:30:01.47 -34:54:45.3 HIP 16493 29.09
2026-05-13 00:00 03:30:02.48 -34:54:42.8 HIP 16493 28.89
2026-05-13 12:00 03:30:03.50 -34:54:40.5 HIP 16493 28.69
2026-05-14 00:00 03:30:04.51 -34:54:38.2 HIP 16493 28.49
2026-05-14 12:00 03:30:05.52 -34:54:36.0 HIP 16493 28.29
2026-05-15 00:00 03:30:06.54 -34:54:33.9 HIP 16493 28.08
2026-05-15 12:00 03:30:07.55 -34:54:31.8 HIP 16493 27.88
2026-05-16 00:00 03:30:08.56 -34:54:29.9 HIP 16493 27.68
2026-05-16 12:00 03:30:09.58 -34:54:28.0 HIP 16493 27.48
2026-05-17 00:00 03:30:10.59 -34:54:26.3 HIP 16493 27.28
2026-05-17 12:00 03:30:11.60 -34:54:24.6 HIP 16493 27.07
2026-05-18 00:00 03:30:12.62 -34:54:23.0 HIP 16493 26.87
2026-05-18 12:00 03:30:13.63 -34:54:21.6 HIP 16493 26.67
2026-05-19 00:00 03:30:14.64 -34:54:20.2 HIP 16493 26.47
2026-05-19 12:00 03:30:15.66 -34:54:18.8 HIP 16493 26.27
2026-05-20 00:00 03:30:16.67 -34:54:17.6 HIP 16493 26.06
2026-05-20 12:00 03:30:17.68 -34:54:16.5 HIP 16493 25.86
2026-05-21 00:00 03:30:18.69 -34:54:15.5 HIP 16493 25.66
2026-05-21 12:00 03:30:19.70 -34:54:14.5 HIP 16493 25.46
2026-05-22 00:00 03:30:20.71 -34:54:13.6 HIP 16493 25.25
2026-05-22 12:00 03:30:21.72 -34:54:12.9 HIP 16493 25.05
2026-05-23 00:00 03:30:22.72 -34:54:12.2 HIP 16493 24.85
2026-05-23 12:00 03:30:23.73 -34:54:11.6 HIP 16493 24.65
2026-05-24 00:00 03:30:24.73 -34:54:11.1 HIP 16493 24.45
2026-05-24 12:00 03:30:25.74 -34:54:10.7 HIP 16493 24.24
2026-05-25 00:00 03:30:26.74 -34:54:10.4 HIP 16493 24.04
2026-05-25 12:00 03:30:27.74 -34:54:10.1 HIP 16493 23.84
2026-05-26 00:00 03:30:28.74 -34:54:10.0 HIP 16493 23.64
2026-05-26 12:00 03:30:29.74 -34:54:09.9 HIP 16493 23.44
2026-05-27 00:00 03:30:30.74 -34:54:10.0 HIP 16493 23.24
2026-05-27 12:00 03:30:31.73 -34:54:10.1 HIP 16493 23.03
2026-05-28 00:00 03:30:32.73 -34:54:10.3 HIP 16493 22.83
2026-05-28 12:00 03:30:33.72 -34:54:10.6 HIP 16493 22.63
2026-05-29 00:00 03:30:34.71 -34:54:11.0 HIP 16493 22.43
2026-05-29 12:00 03:30:35.70 -34:54:11.5 HIP 16493 22.23
2026-05-30 00:00 03:30:36.68 -34:54:12.1 HIP 16493 22.03
2026-05-30 12:00 03:30:37.67 -34:54:12.7 HIP 16493 21.83
2026-05-31 00:00 03:30:38.65 -34:54:13.5 HIP 16493 21.63
2026-05-31 12:00 03:30:39.63 -34:54:14.3 HIP 16493 21.43
2026-06-01 00:00 03:30:40.61 -34:54:15.2 HIP 16493 21.23
2026-06-01 12:00 03:30:41.58 -34:54:16.2 HIP 16493 21.03
2026-06-02 00:00 03:30:42.56 -34:54:17.3 HIP 16493 20.83