| Parameter |
Value |
| Designation |
C/1892 W1 (Brooks) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1893-01-06T23:50:26.018880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:53Z |
| Obs used |
17 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1893-01-08.0000000 |
| e |
1.00000000 |
| q (au) |
1.195109 |
| a (au) |
- |
| i (deg) |
143.849490 |
| Ω (om, deg) |
187.141851 |
| ω (w, deg) |
85.212292 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-06-01 00:00 |
20:35:20.08 |
-54:49:55.7 |
HIP 101636 |
8.93 |
| 2026-06-01 12:00 |
20:35:19.32 |
-54:50:03.0 |
HIP 101636 |
8.91 |
| 2026-06-02 00:00 |
20:35:18.55 |
-54:50:10.4 |
HIP 101636 |
8.90 |
| 2026-06-02 12:00 |
20:35:17.77 |
-54:50:17.7 |
HIP 101636 |
8.90 |
| 2026-06-03 00:00 |
20:35:16.98 |
-54:50:25.0 |
HIP 101636 |
8.90 |
| 2026-06-03 12:00 |
20:35:16.18 |
-54:50:32.3 |
HIP 101636 |
8.90 |
| 2026-06-04 00:00 |
20:35:15.37 |
-54:50:39.5 |
HIP 101636 |
8.91 |
| 2026-06-04 12:00 |
20:35:14.55 |
-54:50:46.8 |
HIP 101636 |
8.92 |
| 2026-06-05 00:00 |
20:35:13.73 |
-54:50:54.0 |
HIP 101636 |
8.93 |
| 2026-06-05 12:00 |
20:35:12.89 |
-54:51:01.2 |
HIP 101636 |
8.96 |
| 2026-06-06 00:00 |
20:35:12.05 |
-54:51:08.4 |
HIP 101636 |
8.98 |
| 2026-06-06 12:00 |
20:35:11.19 |
-54:51:15.5 |
HIP 101636 |
9.01 |
| 2026-06-07 00:00 |
20:35:10.33 |
-54:51:22.7 |
HIP 101636 |
9.04 |
| 2026-06-07 12:00 |
20:35:09.46 |
-54:51:29.8 |
HIP 101636 |
9.08 |
| 2026-06-08 00:00 |
20:35:08.58 |
-54:51:36.9 |
HIP 101636 |
9.12 |
| 2026-06-08 12:00 |
20:35:07.68 |
-54:51:44.0 |
HIP 101636 |
9.17 |
| 2026-06-09 00:00 |
20:35:06.79 |
-54:51:51.0 |
HIP 101636 |
9.22 |
| 2026-06-09 12:00 |
20:35:05.88 |
-54:51:58.0 |
HIP 101636 |
9.28 |
| 2026-06-10 00:00 |
20:35:04.96 |
-54:52:05.0 |
HIP 101636 |
9.34 |
| 2026-06-10 12:00 |
20:35:04.04 |
-54:52:12.0 |
HIP 101636 |
9.40 |
| 2026-06-11 00:00 |
20:35:03.10 |
-54:52:19.0 |
HIP 101636 |
9.47 |
| 2026-06-11 12:00 |
20:35:02.16 |
-54:52:25.9 |
HIP 101636 |
9.54 |
| 2026-06-12 00:00 |
20:35:01.21 |
-54:52:32.8 |
HIP 101636 |
9.62 |
| 2026-06-12 12:00 |
20:35:00.25 |
-54:52:39.7 |
HIP 101636 |
9.70 |
| 2026-06-13 00:00 |
20:34:59.28 |
-54:52:46.5 |
HIP 101636 |
9.78 |
| 2026-06-13 12:00 |
20:34:58.31 |
-54:52:53.3 |
HIP 101636 |
9.87 |
| 2026-06-14 00:00 |
20:34:57.32 |
-54:53:00.1 |
HIP 101636 |
9.96 |
| 2026-06-14 12:00 |
20:34:56.33 |
-54:53:06.8 |
HIP 101636 |
10.06 |
| 2026-06-15 00:00 |
20:34:55.33 |
-54:53:13.6 |
HIP 101636 |
10.16 |
| 2026-06-15 12:00 |
20:34:54.32 |
-54:53:20.2 |
HIP 101636 |
10.26 |
| 2026-06-16 00:00 |
20:34:53.30 |
-54:53:26.9 |
HIP 101636 |
10.37 |
| 2026-06-16 12:00 |
20:34:52.28 |
-54:53:33.5 |
HIP 101636 |
10.48 |
| 2026-06-17 00:00 |
20:34:51.25 |
-54:53:40.1 |
HIP 101636 |
10.59 |
| 2026-06-17 12:00 |
20:34:50.21 |
-54:53:46.7 |
HIP 101636 |
10.70 |
| 2026-06-18 00:00 |
20:34:49.16 |
-54:53:53.2 |
HIP 101636 |
10.82 |
| 2026-06-18 12:00 |
20:34:48.11 |
-54:53:59.7 |
HIP 101636 |
10.94 |
| 2026-06-19 00:00 |
20:34:47.05 |
-54:54:06.2 |
HIP 101636 |
11.07 |
| 2026-06-19 12:00 |
20:34:45.98 |
-54:54:12.6 |
HIP 101636 |
11.20 |
| 2026-06-20 00:00 |
20:34:44.90 |
-54:54:19.0 |
HIP 101636 |
11.33 |
| 2026-06-20 12:00 |
20:34:43.82 |
-54:54:25.3 |
HIP 101636 |
11.46 |
| 2026-06-21 00:00 |
20:34:42.73 |
-54:54:31.7 |
HIP 101636 |
11.60 |
| 2026-06-21 12:00 |
20:34:41.63 |
-54:54:37.9 |
HIP 101636 |
11.73 |
| 2026-06-22 00:00 |
20:34:40.52 |
-54:54:44.2 |
HIP 101636 |
11.88 |