| Parameter |
Value |
| Designation |
7P/Pons-Winnecke |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-01-30T12:40:01.945920Z |
| Orbit solution date (soln_date, UTC) |
2026-03-09T08:45:39Z |
| Obs used |
1692 |
| NEO |
Yes |
| M1 |
16.000 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-05-28.0000000 |
| e |
0.63758286 |
| q (au) |
1.239188 |
| a (au) |
3.419231 |
| i (deg) |
22.334521 |
| Ω (om, deg) |
93.414925 |
| ω (w, deg) |
172.505661 |
| M (ma, deg) |
18.312452 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.651 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.651 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
09:52:08.42 |
+25:14:14.3 |
HIP 48417 |
7.87 |
| 2026-09-20 12:00 |
09:52:47.01 |
+25:12:33.7 |
HIP 48417 |
9.50 |
| 2026-09-21 00:00 |
09:53:25.59 |
+25:10:53.3 |
HIP 48417 |
16.64 |
| 2026-09-21 12:00 |
09:54:04.17 |
+25:09:13.2 |
HIP 48417 |
24.93 |
| 2026-09-22 00:00 |
09:54:42.73 |
+25:07:33.4 |
HIP 48759 |
27.97 |
| 2026-09-22 12:00 |
09:55:21.29 |
+25:05:53.8 |
HIP 48759 |
19.10 |
| 2026-09-23 00:00 |
09:55:59.83 |
+25:04:14.6 |
HIP 48759 |
10.23 |
| 2026-09-23 12:00 |
09:56:38.37 |
+25:02:35.6 |
HIP 48759 |
1.59 |
| 2026-09-24 00:00 |
09:57:16.89 |
+25:00:57.0 |
HIP 48759 |
7.62 |
| 2026-09-24 12:00 |
09:57:55.41 |
+24:59:18.7 |
HIP 48810 |
14.07 |
| 2026-09-25 00:00 |
09:58:33.91 |
+24:57:40.7 |
HIP 48810 |
19.44 |
| 2026-09-25 12:00 |
09:59:12.40 |
+24:56:03.0 |
HIP 49018 |
25.49 |
| 2026-09-26 00:00 |
09:59:50.88 |
+24:54:25.7 |
HIP 49018 |
21.40 |
| 2026-09-26 12:00 |
10:00:29.35 |
+24:52:48.7 |
HIP 49018 |
20.61 |
| 2026-09-27 00:00 |
10:01:07.81 |
+24:51:12.1 |
HIP 49018 |
23.44 |
| 2026-09-27 12:00 |
10:01:46.26 |
+24:49:35.8 |
HIP 49018 |
28.85 |
| 2026-09-28 00:00 |
10:02:24.69 |
+24:47:59.9 |
HIP 49188 |
29.53 |
| 2026-09-28 12:00 |
10:03:03.11 |
+24:46:24.4 |
HIP 49188 |
32.51 |
| 2026-09-29 00:00 |
10:03:41.52 |
+24:44:49.2 |
HIP 49430 |
24.32 |
| 2026-09-29 12:00 |
10:04:19.91 |
+24:43:14.5 |
HIP 49430 |
16.36 |
| 2026-09-30 00:00 |
10:04:58.29 |
+24:41:40.1 |
HIP 49430 |
10.05 |
| 2026-09-30 12:00 |
10:05:36.66 |
+24:40:06.2 |
HIP 49430 |
9.52 |
| 2026-10-01 00:00 |
10:06:15.01 |
+24:38:32.7 |
HIP 49430 |
15.39 |
| 2026-10-01 12:00 |
10:06:53.34 |
+24:36:59.6 |
HIP 49430 |
23.23 |
| 2026-10-02 00:00 |
10:07:31.66 |
+24:35:26.9 |
HIP 49691 |
17.26 |
| 2026-10-02 12:00 |
10:08:09.97 |
+24:33:54.7 |
HIP 49691 |
9.39 |
| 2026-10-03 00:00 |
10:08:48.25 |
+24:32:23.0 |
HIP 49691 |
5.91 |
| 2026-10-03 12:00 |
10:09:26.52 |
+24:30:51.7 |
HIP 49749 |
2.31 |
| 2026-10-04 00:00 |
10:10:04.78 |
+24:29:21.0 |
HIP 49749 |
10.67 |
| 2026-10-04 12:00 |
10:10:43.01 |
+24:27:50.7 |
HIP 49749 |
19.44 |
| 2026-10-05 00:00 |
10:11:21.23 |
+24:26:20.9 |
HIP 49749 |
28.25 |
| 2026-10-05 12:00 |
10:11:59.43 |
+24:24:51.6 |
HIP 50003 |
29.55 |
| 2026-10-06 00:00 |
10:12:37.60 |
+24:23:22.8 |
HIP 50003 |
30.34 |
| 2026-10-06 12:00 |
10:13:15.76 |
+24:21:54.6 |
HIP 50003 |
33.50 |
| 2026-10-07 00:00 |
10:13:53.89 |
+24:20:27.0 |
HIP 50134 |
31.66 |
| 2026-10-07 12:00 |
10:14:32.01 |
+24:18:59.8 |
HIP 50134 |
30.76 |
| 2026-10-08 00:00 |
10:15:10.10 |
+24:17:33.3 |
HIP 50342 |
23.84 |
| 2026-10-08 12:00 |
10:15:48.17 |
+24:16:07.3 |
HIP 50342 |
17.05 |
| 2026-10-09 00:00 |
10:16:26.21 |
+24:14:42.0 |
HIP 50342 |
12.92 |
| 2026-10-09 12:00 |
10:17:04.23 |
+24:13:17.2 |
HIP 50342 |
14.04 |
| 2026-10-10 00:00 |
10:17:42.22 |
+24:11:53.0 |
HIP 50342 |
19.51 |
| 2026-10-10 12:00 |
10:18:20.19 |
+24:10:29.5 |
HIP 50528 |
16.56 |
| 2026-10-11 00:00 |
10:18:58.13 |
+24:09:06.6 |
HIP 50528 |
13.18 |