C/1894 G1 (Gale)
| Parameter |
Value |
| Designation |
C/1894 G1 (Gale) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1894-04-13T21:03:24.776640Z |
| Orbit solution date (soln_date, UTC) |
2023-12-04T20:32:28Z |
| Obs used |
45 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1894-06-04.0000000 |
| e |
0.98894455 |
| q (au) |
0.982984 |
| a (au) |
88.914014 |
| i (deg) |
86.958520 |
| Ω (om, deg) |
207.890404 |
| ω (w, deg) |
324.173891 |
| M (ma, deg) |
0.060098 |
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) |
| 2026-02-03 00:00 |
00:07:27.42 |
+47:04:46.3 |
HIP 485 |
17.02 |
| 2026-02-03 12:00 |
00:07:28.34 |
+47:04:40.7 |
HIP 485 |
17.18 |
| 2026-02-04 00:00 |
00:07:29.26 |
+47:04:35.2 |
HIP 485 |
17.34 |
| 2026-02-04 12:00 |
00:07:30.19 |
+47:04:29.8 |
HIP 485 |
17.50 |
| 2026-02-05 00:00 |
00:07:31.13 |
+47:04:24.5 |
HIP 485 |
17.67 |
| 2026-02-05 12:00 |
00:07:32.08 |
+47:04:19.3 |
HIP 485 |
17.83 |
| 2026-02-06 00:00 |
00:07:33.03 |
+47:04:14.2 |
HIP 485 |
18.00 |
| 2026-02-06 12:00 |
00:07:34.00 |
+47:04:09.2 |
HIP 485 |
18.17 |
| 2026-02-07 00:00 |
00:07:34.97 |
+47:04:04.2 |
HIP 485 |
18.34 |
| 2026-02-07 12:00 |
00:07:35.95 |
+47:03:59.4 |
HIP 485 |
18.51 |
| 2026-02-08 00:00 |
00:07:36.94 |
+47:03:54.6 |
HIP 485 |
18.69 |
| 2026-02-08 12:00 |
00:07:37.94 |
+47:03:50.0 |
HIP 485 |
18.86 |
| 2026-02-09 00:00 |
00:07:38.94 |
+47:03:45.4 |
HIP 591 |
18.95 |
| 2026-02-09 12:00 |
00:07:39.96 |
+47:03:41.0 |
HIP 591 |
18.92 |
| 2026-02-10 00:00 |
00:07:40.98 |
+47:03:36.6 |
HIP 591 |
18.89 |
| 2026-02-10 12:00 |
00:07:42.00 |
+47:03:32.4 |
HIP 591 |
18.87 |
| 2026-02-11 00:00 |
00:07:43.04 |
+47:03:28.2 |
HIP 591 |
18.86 |
| 2026-02-11 12:00 |
00:07:44.08 |
+47:03:24.1 |
HIP 591 |
18.85 |
| 2026-02-12 00:00 |
00:07:45.13 |
+47:03:20.1 |
HIP 591 |
18.84 |
| 2026-02-12 12:00 |
00:07:46.19 |
+47:03:16.2 |
HIP 591 |
18.83 |
| 2026-02-13 00:00 |
00:07:47.26 |
+47:03:12.4 |
HIP 591 |
18.83 |
| 2026-02-13 12:00 |
00:07:48.33 |
+47:03:08.8 |
HIP 591 |
18.84 |
| 2026-02-14 00:00 |
00:07:49.41 |
+47:03:05.2 |
HIP 591 |
18.84 |
| 2026-02-14 12:00 |
00:07:50.50 |
+47:03:01.7 |
HIP 591 |
18.85 |
| 2026-02-15 00:00 |
00:07:51.59 |
+47:02:58.3 |
HIP 591 |
18.87 |
| 2026-02-15 12:00 |
00:07:52.69 |
+47:02:55.0 |
HIP 591 |
18.89 |
| 2026-02-16 00:00 |
00:07:53.80 |
+47:02:51.8 |
HIP 591 |
18.91 |
| 2026-02-16 12:00 |
00:07:54.91 |
+47:02:48.7 |
HIP 591 |
18.94 |
| 2026-02-17 00:00 |
00:07:56.04 |
+47:02:45.7 |
HIP 591 |
18.97 |
| 2026-02-17 12:00 |
00:07:57.16 |
+47:02:42.8 |
HIP 591 |
19.00 |
| 2026-02-18 00:00 |
00:07:58.30 |
+47:02:40.0 |
HIP 591 |
19.04 |
| 2026-02-18 12:00 |
00:07:59.44 |
+47:02:37.3 |
HIP 591 |
19.08 |
| 2026-02-19 00:00 |
00:08:00.58 |
+47:02:34.6 |
HIP 591 |
19.13 |
| 2026-02-19 12:00 |
00:08:01.74 |
+47:02:32.1 |
HIP 591 |
19.18 |
| 2026-02-20 00:00 |
00:08:02.90 |
+47:02:29.7 |
HIP 591 |
19.24 |
| 2026-02-20 12:00 |
00:08:04.06 |
+47:02:27.4 |
HIP 591 |
19.30 |
| 2026-02-21 00:00 |
00:08:05.23 |
+47:02:25.2 |
HIP 591 |
19.36 |
| 2026-02-21 12:00 |
00:08:06.41 |
+47:02:23.1 |
HIP 591 |
19.42 |
| 2026-02-22 00:00 |
00:08:07.59 |
+47:02:21.1 |
HIP 591 |
19.49 |
| 2026-02-22 12:00 |
00:08:08.78 |
+47:02:19.2 |
HIP 591 |
19.57 |
| 2026-02-23 00:00 |
00:08:09.97 |
+47:02:17.4 |
HIP 591 |
19.65 |
| 2026-02-23 12:00 |
00:08:11.17 |
+47:02:15.7 |
HIP 591 |
19.73 |
| 2026-02-24 00:00 |
00:08:12.37 |
+47:02:14.1 |
HIP 591 |
19.81 |