| 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) |
| 2026-07-29 00:00 |
08:44:34.33 |
+28:16:31.2 |
HIP 42976 |
16.16 |
| 2026-07-29 12:00 |
08:45:11.46 |
+28:14:54.4 |
HIP 42976 |
12.59 |
| 2026-07-30 00:00 |
08:45:48.63 |
+28:13:17.3 |
HIP 43020 |
10.42 |
| 2026-07-30 12:00 |
08:46:25.83 |
+28:11:40.0 |
HIP 43129 |
9.35 |
| 2026-07-31 00:00 |
08:47:03.07 |
+28:10:02.4 |
HIP 43129 |
0.99 |
| 2026-07-31 12:00 |
08:47:40.35 |
+28:08:24.6 |
HIP 43129 |
7.40 |
| 2026-08-01 00:00 |
08:48:17.65 |
+28:06:46.6 |
HIP 43129 |
15.78 |
| 2026-08-01 12:00 |
08:48:55.00 |
+28:05:08.4 |
HIP 43129 |
24.18 |
| 2026-08-02 00:00 |
08:49:32.37 |
+28:03:29.9 |
HIP 43129 |
32.59 |
| 2026-08-02 12:00 |
08:50:09.78 |
+28:01:51.2 |
HIP 43575 |
33.53 |
| 2026-08-03 00:00 |
08:50:47.23 |
+28:00:12.2 |
HIP 43575 |
27.11 |
| 2026-08-03 12:00 |
08:51:24.70 |
+27:58:33.1 |
HIP 43575 |
22.08 |
| 2026-08-04 00:00 |
08:52:02.21 |
+27:56:53.7 |
HIP 43575 |
19.54 |
| 2026-08-04 12:00 |
08:52:39.75 |
+27:55:14.1 |
HIP 43575 |
20.46 |
| 2026-08-05 00:00 |
08:53:17.33 |
+27:53:34.3 |
HIP 43575 |
24.47 |
| 2026-08-05 12:00 |
08:53:54.93 |
+27:51:54.2 |
HIP 43834 |
23.45 |
| 2026-08-06 00:00 |
08:54:32.57 |
+27:50:14.0 |
HIP 43834 |
15.79 |
| 2026-08-06 12:00 |
08:55:10.23 |
+27:48:33.5 |
HIP 43834 |
9.63 |
| 2026-08-07 00:00 |
08:55:47.93 |
+27:46:52.9 |
HIP 43834 |
8.96 |
| 2026-08-07 12:00 |
08:56:25.65 |
+27:45:12.0 |
HIP 43834 |
14.58 |
| 2026-08-08 00:00 |
08:57:03.41 |
+27:43:31.0 |
HIP 43834 |
22.13 |
| 2026-08-08 12:00 |
08:57:41.19 |
+27:41:49.7 |
HIP 43834 |
30.22 |
| 2026-08-09 00:00 |
08:58:19.00 |
+27:40:08.3 |
HIP 43834 |
38.50 |
| 2026-08-09 12:00 |
08:58:56.84 |
+27:38:26.7 |
HIP 44342 |
41.18 |
| 2026-08-10 00:00 |
08:59:34.71 |
+27:36:44.9 |
HIP 44342 |
34.42 |
| 2026-08-10 12:00 |
09:00:12.60 |
+27:35:02.9 |
HIP 44342 |
28.62 |
| 2026-08-11 00:00 |
09:00:50.52 |
+27:33:20.8 |
HIP 44342 |
24.50 |
| 2026-08-11 12:00 |
09:01:28.46 |
+27:31:38.5 |
HIP 44342 |
22.97 |
| 2026-08-12 00:00 |
09:02:06.43 |
+27:29:56.0 |
HIP 44438 |
23.02 |
| 2026-08-12 12:00 |
09:02:44.42 |
+27:28:13.3 |
HIP 44438 |
16.97 |
| 2026-08-13 00:00 |
09:03:22.44 |
+27:26:30.5 |
HIP 44438 |
13.93 |
| 2026-08-13 12:00 |
09:04:00.47 |
+27:24:47.6 |
HIP 44438 |
15.76 |
| 2026-08-14 00:00 |
09:04:38.53 |
+27:23:04.5 |
HIP 44438 |
21.26 |
| 2026-08-14 12:00 |
09:05:16.62 |
+27:21:21.3 |
HIP 44438 |
28.37 |
| 2026-08-15 00:00 |
09:05:54.72 |
+27:19:37.9 |
HIP 44823 |
31.64 |
| 2026-08-15 12:00 |
09:06:32.84 |
+27:17:54.4 |
HIP 44823 |
25.36 |
| 2026-08-16 00:00 |
09:07:10.98 |
+27:16:10.8 |
HIP 44823 |
20.83 |
| 2026-08-16 12:00 |
09:07:49.15 |
+27:14:27.0 |
HIP 44858 |
19.28 |
| 2026-08-17 00:00 |
09:08:27.33 |
+27:12:43.1 |
HIP 44920 |
15.45 |
| 2026-08-17 12:00 |
09:09:05.53 |
+27:10:59.1 |
HIP 44920 |
14.95 |
| 2026-08-18 00:00 |
09:09:43.75 |
+27:09:15.0 |
HIP 44920 |
18.93 |
| 2026-08-18 12:00 |
09:10:21.99 |
+27:07:30.8 |
HIP 44920 |
25.38 |
| 2026-08-19 00:00 |
09:11:00.24 |
+27:05:46.5 |
HIP 45178 |
22.68 |