| 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) |
| 2026-07-29 00:00 |
20:33:05.56 |
-55:00:16.5 |
HIP 101636 |
25.64 |
| 2026-07-29 12:00 |
20:33:04.19 |
-55:00:18.9 |
HIP 101636 |
25.84 |
| 2026-07-30 00:00 |
20:33:02.81 |
-55:00:21.3 |
HIP 101636 |
26.05 |
| 2026-07-30 12:00 |
20:33:01.44 |
-55:00:23.6 |
HIP 101636 |
26.25 |
| 2026-07-31 00:00 |
20:33:00.07 |
-55:00:25.8 |
HIP 101636 |
26.45 |
| 2026-07-31 12:00 |
20:32:58.69 |
-55:00:28.0 |
HIP 101636 |
26.65 |
| 2026-08-01 00:00 |
20:32:57.32 |
-55:00:30.1 |
HIP 101636 |
26.85 |
| 2026-08-01 12:00 |
20:32:55.95 |
-55:00:32.2 |
HIP 101636 |
27.05 |
| 2026-08-02 00:00 |
20:32:54.58 |
-55:00:34.2 |
HIP 101636 |
27.25 |
| 2026-08-02 12:00 |
20:32:53.20 |
-55:00:36.1 |
HIP 101636 |
27.44 |
| 2026-08-03 00:00 |
20:32:51.83 |
-55:00:38.0 |
HIP 101636 |
27.64 |
| 2026-08-03 12:00 |
20:32:50.46 |
-55:00:39.8 |
HIP 101636 |
27.84 |
| 2026-08-04 00:00 |
20:32:49.10 |
-55:00:41.5 |
HIP 101103 |
27.83 |
| 2026-08-04 12:00 |
20:32:47.73 |
-55:00:43.2 |
HIP 101103 |
27.63 |
| 2026-08-05 00:00 |
20:32:46.36 |
-55:00:44.8 |
HIP 101103 |
27.43 |
| 2026-08-05 12:00 |
20:32:45.00 |
-55:00:46.3 |
HIP 101103 |
27.24 |
| 2026-08-06 00:00 |
20:32:43.63 |
-55:00:47.8 |
HIP 101103 |
27.04 |
| 2026-08-06 12:00 |
20:32:42.27 |
-55:00:49.3 |
HIP 101103 |
26.85 |
| 2026-08-07 00:00 |
20:32:40.91 |
-55:00:50.6 |
HIP 101103 |
26.65 |
| 2026-08-07 12:00 |
20:32:39.55 |
-55:00:51.9 |
HIP 101103 |
26.46 |
| 2026-08-08 00:00 |
20:32:38.19 |
-55:00:53.2 |
HIP 101103 |
26.26 |
| 2026-08-08 12:00 |
20:32:36.84 |
-55:00:54.3 |
HIP 101103 |
26.07 |
| 2026-08-09 00:00 |
20:32:35.48 |
-55:00:55.4 |
HIP 101103 |
25.88 |
| 2026-08-09 12:00 |
20:32:34.13 |
-55:00:56.5 |
HIP 101103 |
25.68 |
| 2026-08-10 00:00 |
20:32:32.78 |
-55:00:57.4 |
HIP 101103 |
25.49 |
| 2026-08-10 12:00 |
20:32:31.44 |
-55:00:58.4 |
HIP 101103 |
25.30 |
| 2026-08-11 00:00 |
20:32:30.09 |
-55:00:59.2 |
HIP 101103 |
25.11 |
| 2026-08-11 12:00 |
20:32:28.75 |
-55:01:00.0 |
HIP 101103 |
24.92 |
| 2026-08-12 00:00 |
20:32:27.41 |
-55:01:00.7 |
HIP 101103 |
24.73 |
| 2026-08-12 12:00 |
20:32:26.07 |
-55:01:01.4 |
HIP 101103 |
24.55 |
| 2026-08-13 00:00 |
20:32:24.74 |
-55:01:01.9 |
HIP 101103 |
24.36 |
| 2026-08-13 12:00 |
20:32:23.41 |
-55:01:02.5 |
HIP 101103 |
24.17 |
| 2026-08-14 00:00 |
20:32:22.08 |
-55:01:02.9 |
HIP 101103 |
23.99 |
| 2026-08-14 12:00 |
20:32:20.76 |
-55:01:03.3 |
HIP 101103 |
23.80 |
| 2026-08-15 00:00 |
20:32:19.43 |
-55:01:03.6 |
HIP 101103 |
23.62 |
| 2026-08-15 12:00 |
20:32:18.12 |
-55:01:03.9 |
HIP 101103 |
23.43 |
| 2026-08-16 00:00 |
20:32:16.80 |
-55:01:04.1 |
HIP 101103 |
23.25 |
| 2026-08-16 12:00 |
20:32:15.49 |
-55:01:04.2 |
HIP 101103 |
23.07 |
| 2026-08-17 00:00 |
20:32:14.18 |
-55:01:04.3 |
HIP 101103 |
22.89 |
| 2026-08-17 12:00 |
20:32:12.88 |
-55:01:04.3 |
HIP 101103 |
22.71 |
| 2026-08-18 00:00 |
20:32:11.58 |
-55:01:04.2 |
HIP 101103 |
22.53 |
| 2026-08-18 12:00 |
20:32:10.28 |
-55:01:04.1 |
HIP 101103 |
22.35 |
| 2026-08-19 00:00 |
20:32:08.99 |
-55:01:03.9 |
HIP 101103 |
22.17 |