| Parameter |
Value |
| Designation |
C/1979 M3 (Torres) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1979-07-15T09:58:57.475200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1979-07-15.0000000 |
| e |
1.00102434 |
| q (au) |
4.686875 |
| a (au) |
-4575.484905 |
| i (deg) |
92.178306 |
| Ω (om, deg) |
293.136764 |
| ω (w, deg) |
10.102772 |
| M (ma, deg) |
-0.000001 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.059 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.059 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-20 00:00 |
08:04:54.51 |
+40:45:10.4 |
HIP 39534 |
25.04 |
| 2026-09-20 12:00 |
08:04:55.61 |
+40:45:14.4 |
HIP 39534 |
24.99 |
| 2026-09-21 00:00 |
08:04:56.70 |
+40:45:18.4 |
HIP 39534 |
24.94 |
| 2026-09-21 12:00 |
08:04:57.77 |
+40:45:22.5 |
HIP 39534 |
24.89 |
| 2026-09-22 00:00 |
08:04:58.83 |
+40:45:26.7 |
HIP 39534 |
24.84 |
| 2026-09-22 12:00 |
08:04:59.87 |
+40:45:31.0 |
HIP 39534 |
24.79 |
| 2026-09-23 00:00 |
08:05:00.89 |
+40:45:35.3 |
HIP 39534 |
24.74 |
| 2026-09-23 12:00 |
08:05:01.90 |
+40:45:39.7 |
HIP 39534 |
24.69 |
| 2026-09-24 00:00 |
08:05:02.89 |
+40:45:44.2 |
HIP 39534 |
24.65 |
| 2026-09-24 12:00 |
08:05:03.86 |
+40:45:48.8 |
HIP 39534 |
24.60 |
| 2026-09-25 00:00 |
08:05:04.82 |
+40:45:53.4 |
HIP 39534 |
24.55 |
| 2026-09-25 12:00 |
08:05:05.77 |
+40:45:58.1 |
HIP 39534 |
24.50 |
| 2026-09-26 00:00 |
08:05:06.69 |
+40:46:02.9 |
HIP 39534 |
24.45 |
| 2026-09-26 12:00 |
08:05:07.60 |
+40:46:07.7 |
HIP 39534 |
24.40 |
| 2026-09-27 00:00 |
08:05:08.50 |
+40:46:12.6 |
HIP 39534 |
24.35 |
| 2026-09-27 12:00 |
08:05:09.37 |
+40:46:17.6 |
HIP 39534 |
24.30 |
| 2026-09-28 00:00 |
08:05:10.23 |
+40:46:22.7 |
HIP 39534 |
24.25 |
| 2026-09-28 12:00 |
08:05:11.07 |
+40:46:27.8 |
HIP 39534 |
24.20 |
| 2026-09-29 00:00 |
08:05:11.90 |
+40:46:33.0 |
HIP 39534 |
24.14 |
| 2026-09-29 12:00 |
08:05:12.71 |
+40:46:38.3 |
HIP 39534 |
24.09 |
| 2026-09-30 00:00 |
08:05:13.50 |
+40:46:43.6 |
HIP 39534 |
24.04 |
| 2026-09-30 12:00 |
08:05:14.28 |
+40:46:49.0 |
HIP 39534 |
23.98 |
| 2026-10-01 00:00 |
08:05:15.03 |
+40:46:54.5 |
HIP 39534 |
23.93 |
| 2026-10-01 12:00 |
08:05:15.77 |
+40:47:00.0 |
HIP 39534 |
23.87 |
| 2026-10-02 00:00 |
08:05:16.50 |
+40:47:05.7 |
HIP 39534 |
23.82 |
| 2026-10-02 12:00 |
08:05:17.20 |
+40:47:11.3 |
HIP 39534 |
23.76 |
| 2026-10-03 00:00 |
08:05:17.89 |
+40:47:17.1 |
HIP 39534 |
23.70 |
| 2026-10-03 12:00 |
08:05:18.56 |
+40:47:22.9 |
HIP 39534 |
23.64 |
| 2026-10-04 00:00 |
08:05:19.21 |
+40:47:28.8 |
HIP 39534 |
23.58 |
| 2026-10-04 12:00 |
08:05:19.85 |
+40:47:34.7 |
HIP 39534 |
23.52 |
| 2026-10-05 00:00 |
08:05:20.46 |
+40:47:40.7 |
HIP 39534 |
23.46 |
| 2026-10-05 12:00 |
08:05:21.06 |
+40:47:46.8 |
HIP 39534 |
23.39 |
| 2026-10-06 00:00 |
08:05:21.65 |
+40:47:53.0 |
HIP 39534 |
23.33 |
| 2026-10-06 12:00 |
08:05:22.21 |
+40:47:59.2 |
HIP 39534 |
23.26 |
| 2026-10-07 00:00 |
08:05:22.75 |
+40:48:05.4 |
HIP 39534 |
23.19 |
| 2026-10-07 12:00 |
08:05:23.28 |
+40:48:11.8 |
HIP 39534 |
23.12 |
| 2026-10-08 00:00 |
08:05:23.79 |
+40:48:18.2 |
HIP 39534 |
23.05 |
| 2026-10-08 12:00 |
08:05:24.28 |
+40:48:24.6 |
HIP 39534 |
22.98 |
| 2026-10-09 00:00 |
08:05:24.75 |
+40:48:31.2 |
HIP 39593 |
22.89 |
| 2026-10-09 12:00 |
08:05:25.21 |
+40:48:37.7 |
HIP 39593 |
22.78 |
| 2026-10-10 00:00 |
08:05:25.64 |
+40:48:44.4 |
HIP 39593 |
22.67 |
| 2026-10-10 12:00 |
08:05:26.06 |
+40:48:51.1 |
HIP 39593 |
22.56 |
| 2026-10-11 00:00 |
08:05:26.46 |
+40:48:57.9 |
HIP 39593 |
22.45 |