C/1979 M3 (Torres)
| 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) |
| 2026-02-03 00:00 |
08:00:16.73 |
+41:30:29.9 |
HIP 39113 |
5.36 |
| 2026-02-03 12:00 |
08:00:14.47 |
+41:30:31.0 |
HIP 39113 |
5.27 |
| 2026-02-04 00:00 |
08:00:12.22 |
+41:30:31.9 |
HIP 39113 |
5.21 |
| 2026-02-04 12:00 |
08:00:09.97 |
+41:30:32.8 |
HIP 39113 |
5.18 |
| 2026-02-05 00:00 |
08:00:07.73 |
+41:30:33.6 |
HIP 39113 |
5.18 |
| 2026-02-05 12:00 |
08:00:05.49 |
+41:30:34.2 |
HIP 39113 |
5.21 |
| 2026-02-06 00:00 |
08:00:03.26 |
+41:30:34.8 |
HIP 39113 |
5.28 |
| 2026-02-06 12:00 |
08:00:01.04 |
+41:30:35.3 |
HIP 39113 |
5.38 |
| 2026-02-07 00:00 |
07:59:58.83 |
+41:30:35.7 |
HIP 39113 |
5.50 |
| 2026-02-07 12:00 |
07:59:56.62 |
+41:30:36.0 |
HIP 39113 |
5.65 |
| 2026-02-08 00:00 |
07:59:54.42 |
+41:30:36.2 |
HIP 39113 |
5.83 |
| 2026-02-08 12:00 |
07:59:52.23 |
+41:30:36.3 |
HIP 39113 |
6.02 |
| 2026-02-09 00:00 |
07:59:50.04 |
+41:30:36.3 |
HIP 39113 |
6.23 |
| 2026-02-09 12:00 |
07:59:47.86 |
+41:30:36.2 |
HIP 39113 |
6.47 |
| 2026-02-10 00:00 |
07:59:45.69 |
+41:30:36.0 |
HIP 39113 |
6.71 |
| 2026-02-10 12:00 |
07:59:43.53 |
+41:30:35.7 |
HIP 39113 |
6.97 |
| 2026-02-11 00:00 |
07:59:41.38 |
+41:30:35.4 |
HIP 39113 |
7.24 |
| 2026-02-11 12:00 |
07:59:39.24 |
+41:30:34.9 |
HIP 39113 |
7.52 |
| 2026-02-12 00:00 |
07:59:37.10 |
+41:30:34.3 |
HIP 39113 |
7.80 |
| 2026-02-12 12:00 |
07:59:34.97 |
+41:30:33.7 |
HIP 39113 |
8.10 |
| 2026-02-13 00:00 |
07:59:32.86 |
+41:30:32.9 |
HIP 39113 |
8.40 |
| 2026-02-13 12:00 |
07:59:30.75 |
+41:30:32.0 |
HIP 39113 |
8.71 |
| 2026-02-14 00:00 |
07:59:28.65 |
+41:30:31.1 |
HIP 39113 |
9.02 |
| 2026-02-14 12:00 |
07:59:26.56 |
+41:30:30.1 |
HIP 39113 |
9.33 |
| 2026-02-15 00:00 |
07:59:24.48 |
+41:30:28.9 |
HIP 39113 |
9.65 |
| 2026-02-15 12:00 |
07:59:22.41 |
+41:30:27.7 |
HIP 39113 |
9.97 |
| 2026-02-16 00:00 |
07:59:20.35 |
+41:30:26.4 |
HIP 39113 |
10.30 |
| 2026-02-16 12:00 |
07:59:18.30 |
+41:30:24.9 |
HIP 39113 |
10.62 |
| 2026-02-17 00:00 |
07:59:16.26 |
+41:30:23.4 |
HIP 39113 |
10.95 |
| 2026-02-17 12:00 |
07:59:14.23 |
+41:30:21.8 |
HIP 39113 |
11.27 |
| 2026-02-18 00:00 |
07:59:12.21 |
+41:30:20.1 |
HIP 39113 |
11.60 |
| 2026-02-18 12:00 |
07:59:10.20 |
+41:30:18.3 |
HIP 39113 |
11.93 |
| 2026-02-19 00:00 |
07:59:08.21 |
+41:30:16.4 |
HIP 39113 |
12.26 |
| 2026-02-19 12:00 |
07:59:06.22 |
+41:30:14.4 |
HIP 39113 |
12.59 |
| 2026-02-20 00:00 |
07:59:04.25 |
+41:30:12.3 |
HIP 39113 |
12.92 |
| 2026-02-20 12:00 |
07:59:02.29 |
+41:30:10.1 |
HIP 39113 |
13.25 |
| 2026-02-21 00:00 |
07:59:00.34 |
+41:30:07.9 |
HIP 39113 |
13.57 |
| 2026-02-21 12:00 |
07:58:58.40 |
+41:30:05.5 |
HIP 39113 |
13.90 |
| 2026-02-22 00:00 |
07:58:56.47 |
+41:30:03.0 |
HIP 39113 |
14.23 |
| 2026-02-22 12:00 |
07:58:54.56 |
+41:30:00.5 |
HIP 38956 |
14.09 |
| 2026-02-23 00:00 |
07:58:52.65 |
+41:29:57.8 |
HIP 38956 |
13.86 |
| 2026-02-23 12:00 |
07:58:50.76 |
+41:29:55.1 |
HIP 38956 |
13.63 |
| 2026-02-24 00:00 |
07:58:48.89 |
+41:29:52.2 |
HIP 38956 |
13.41 |