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