| 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
Scatter + Global Linear
$$
M_a = (6.314 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.314 |
| n |
6.000 |
| gf |
0.973 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.849 |
| 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) |
| 2026-07-29 00:00 |
03:32:03.16 |
-35:05:07.3 |
HIP 16493 |
8.12 |
| 2026-07-29 12:00 |
03:32:03.48 |
-35:05:16.7 |
HIP 16493 |
8.22 |
| 2026-07-30 00:00 |
03:32:03.80 |
-35:05:26.2 |
HIP 16493 |
8.33 |
| 2026-07-30 12:00 |
03:32:04.11 |
-35:05:35.7 |
HIP 16493 |
8.45 |
| 2026-07-31 00:00 |
03:32:04.41 |
-35:05:45.3 |
HIP 16493 |
8.56 |
| 2026-07-31 12:00 |
03:32:04.71 |
-35:05:54.9 |
HIP 16493 |
8.68 |
| 2026-08-01 00:00 |
03:32:04.99 |
-35:06:04.5 |
HIP 16493 |
8.80 |
| 2026-08-01 12:00 |
03:32:05.27 |
-35:06:14.2 |
HIP 16493 |
8.93 |
| 2026-08-02 00:00 |
03:32:05.54 |
-35:06:23.9 |
HIP 16493 |
9.06 |
| 2026-08-02 12:00 |
03:32:05.80 |
-35:06:33.7 |
HIP 16493 |
9.19 |
| 2026-08-03 00:00 |
03:32:06.05 |
-35:06:43.5 |
HIP 16493 |
9.32 |
| 2026-08-03 12:00 |
03:32:06.29 |
-35:06:53.3 |
HIP 16493 |
9.45 |
| 2026-08-04 00:00 |
03:32:06.53 |
-35:07:03.2 |
HIP 16493 |
9.59 |
| 2026-08-04 12:00 |
03:32:06.76 |
-35:07:13.1 |
HIP 16493 |
9.73 |
| 2026-08-05 00:00 |
03:32:06.98 |
-35:07:23.1 |
HIP 16493 |
9.87 |
| 2026-08-05 12:00 |
03:32:07.19 |
-35:07:33.1 |
HIP 16493 |
10.02 |
| 2026-08-06 00:00 |
03:32:07.39 |
-35:07:43.1 |
HIP 16493 |
10.17 |
| 2026-08-06 12:00 |
03:32:07.58 |
-35:07:53.2 |
HIP 16493 |
10.31 |
| 2026-08-07 00:00 |
03:32:07.77 |
-35:08:03.3 |
HIP 16493 |
10.46 |
| 2026-08-07 12:00 |
03:32:07.94 |
-35:08:13.4 |
HIP 16493 |
10.61 |
| 2026-08-08 00:00 |
03:32:08.11 |
-35:08:23.6 |
HIP 16493 |
10.77 |
| 2026-08-08 12:00 |
03:32:08.27 |
-35:08:33.8 |
HIP 16493 |
10.92 |
| 2026-08-09 00:00 |
03:32:08.42 |
-35:08:44.0 |
HIP 16493 |
11.08 |
| 2026-08-09 12:00 |
03:32:08.56 |
-35:08:54.2 |
HIP 16493 |
11.24 |
| 2026-08-10 00:00 |
03:32:08.69 |
-35:09:04.5 |
HIP 16493 |
11.40 |
| 2026-08-10 12:00 |
03:32:08.82 |
-35:09:14.9 |
HIP 16493 |
11.56 |
| 2026-08-11 00:00 |
03:32:08.94 |
-35:09:25.2 |
HIP 16493 |
11.72 |
| 2026-08-11 12:00 |
03:32:09.04 |
-35:09:35.6 |
HIP 16493 |
11.88 |
| 2026-08-12 00:00 |
03:32:09.14 |
-35:09:46.0 |
HIP 16493 |
12.04 |
| 2026-08-12 12:00 |
03:32:09.23 |
-35:09:56.4 |
HIP 16493 |
12.21 |
| 2026-08-13 00:00 |
03:32:09.31 |
-35:10:06.9 |
HIP 16493 |
12.38 |
| 2026-08-13 12:00 |
03:32:09.38 |
-35:10:17.3 |
HIP 16493 |
12.54 |
| 2026-08-14 00:00 |
03:32:09.45 |
-35:10:27.8 |
HIP 16493 |
12.71 |
| 2026-08-14 12:00 |
03:32:09.50 |
-35:10:38.4 |
HIP 16493 |
12.88 |
| 2026-08-15 00:00 |
03:32:09.55 |
-35:10:48.9 |
HIP 16493 |
13.05 |
| 2026-08-15 12:00 |
03:32:09.59 |
-35:10:59.5 |
HIP 16493 |
13.22 |
| 2026-08-16 00:00 |
03:32:09.62 |
-35:11:10.1 |
HIP 16493 |
13.39 |
| 2026-08-16 12:00 |
03:32:09.64 |
-35:11:20.7 |
HIP 16493 |
13.57 |
| 2026-08-17 00:00 |
03:32:09.65 |
-35:11:31.3 |
HIP 16493 |
13.74 |
| 2026-08-17 12:00 |
03:32:09.65 |
-35:11:41.9 |
HIP 16493 |
13.91 |
| 2026-08-18 00:00 |
03:32:09.64 |
-35:11:52.6 |
HIP 16493 |
14.09 |
| 2026-08-18 12:00 |
03:32:09.63 |
-35:12:03.3 |
HIP 16493 |
14.26 |
| 2026-08-19 00:00 |
03:32:09.60 |
-35:12:14.0 |
HIP 16493 |
14.44 |