| 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
$$
M_a = (10.652 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.652 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.502 |
| 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 |
07:57:21.14 |
+41:08:55.1 |
HIP 38839 |
7.20 |
| 2026-05-12 12:00 |
07:57:21.99 |
+41:08:44.0 |
HIP 38839 |
7.19 |
| 2026-05-13 00:00 |
07:57:22.85 |
+41:08:33.0 |
HIP 38839 |
7.18 |
| 2026-05-13 12:00 |
07:57:23.73 |
+41:08:21.9 |
HIP 38839 |
7.19 |
| 2026-05-14 00:00 |
07:57:24.63 |
+41:08:10.8 |
HIP 38839 |
7.21 |
| 2026-05-14 12:00 |
07:57:25.55 |
+41:07:59.7 |
HIP 38839 |
7.24 |
| 2026-05-15 00:00 |
07:57:26.48 |
+41:07:48.6 |
HIP 38839 |
7.28 |
| 2026-05-15 12:00 |
07:57:27.42 |
+41:07:37.5 |
HIP 38839 |
7.33 |
| 2026-05-16 00:00 |
07:57:28.39 |
+41:07:26.4 |
HIP 38839 |
7.39 |
| 2026-05-16 12:00 |
07:57:29.37 |
+41:07:15.3 |
HIP 38839 |
7.47 |
| 2026-05-17 00:00 |
07:57:30.36 |
+41:07:04.2 |
HIP 38839 |
7.55 |
| 2026-05-17 12:00 |
07:57:31.38 |
+41:06:53.1 |
HIP 38839 |
7.65 |
| 2026-05-18 00:00 |
07:57:32.41 |
+41:06:42.0 |
HIP 38839 |
7.76 |
| 2026-05-18 12:00 |
07:57:33.45 |
+41:06:30.9 |
HIP 38839 |
7.88 |
| 2026-05-19 00:00 |
07:57:34.51 |
+41:06:19.9 |
HIP 38839 |
8.00 |
| 2026-05-19 12:00 |
07:57:35.59 |
+41:06:08.8 |
HIP 38839 |
8.14 |
| 2026-05-20 00:00 |
07:57:36.68 |
+41:05:57.7 |
HIP 38926 |
8.22 |
| 2026-05-20 12:00 |
07:57:37.79 |
+41:05:46.7 |
HIP 38926 |
7.96 |
| 2026-05-21 00:00 |
07:57:38.91 |
+41:05:35.6 |
HIP 38926 |
7.71 |
| 2026-05-21 12:00 |
07:57:40.05 |
+41:05:24.6 |
HIP 38926 |
7.46 |
| 2026-05-22 00:00 |
07:57:41.20 |
+41:05:13.6 |
HIP 38926 |
7.21 |
| 2026-05-22 12:00 |
07:57:42.37 |
+41:05:02.5 |
HIP 38926 |
6.96 |
| 2026-05-23 00:00 |
07:57:43.56 |
+41:04:51.5 |
HIP 38926 |
6.71 |
| 2026-05-23 12:00 |
07:57:44.76 |
+41:04:40.5 |
HIP 38926 |
6.47 |
| 2026-05-24 00:00 |
07:57:45.97 |
+41:04:29.6 |
HIP 38926 |
6.23 |
| 2026-05-24 12:00 |
07:57:47.20 |
+41:04:18.6 |
HIP 38926 |
6.00 |
| 2026-05-25 00:00 |
07:57:48.44 |
+41:04:07.6 |
HIP 38926 |
5.76 |
| 2026-05-25 12:00 |
07:57:49.70 |
+41:03:56.7 |
HIP 38926 |
5.54 |
| 2026-05-26 00:00 |
07:57:50.97 |
+41:03:45.8 |
HIP 38926 |
5.32 |
| 2026-05-26 12:00 |
07:57:52.26 |
+41:03:34.9 |
HIP 38926 |
5.11 |
| 2026-05-27 00:00 |
07:57:53.56 |
+41:03:24.0 |
HIP 38926 |
4.92 |
| 2026-05-27 12:00 |
07:57:54.88 |
+41:03:13.1 |
HIP 38926 |
4.73 |
| 2026-05-28 00:00 |
07:57:56.21 |
+41:03:02.2 |
HIP 38926 |
4.56 |
| 2026-05-28 12:00 |
07:57:57.55 |
+41:02:51.4 |
HIP 38926 |
4.40 |
| 2026-05-29 00:00 |
07:57:58.91 |
+41:02:40.5 |
HIP 38926 |
4.26 |
| 2026-05-29 12:00 |
07:58:00.28 |
+41:02:29.7 |
HIP 38926 |
4.14 |
| 2026-05-30 00:00 |
07:58:01.66 |
+41:02:19.0 |
HIP 38926 |
4.04 |
| 2026-05-30 12:00 |
07:58:03.06 |
+41:02:08.2 |
HIP 38926 |
3.96 |
| 2026-05-31 00:00 |
07:58:04.47 |
+41:01:57.4 |
HIP 38926 |
3.92 |
| 2026-05-31 12:00 |
07:58:05.90 |
+41:01:46.7 |
HIP 38926 |
3.90 |
| 2026-06-01 00:00 |
07:58:07.33 |
+41:01:36.0 |
HIP 38926 |
3.91 |
| 2026-06-01 12:00 |
07:58:08.79 |
+41:01:25.3 |
HIP 38926 |
3.94 |
| 2026-06-02 00:00 |
07:58:10.25 |
+41:01:14.7 |
HIP 38926 |
4.01 |