| Parameter |
Value |
| Designation |
347P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-09-11T07:07:18.474240Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:47Z |
| Obs used |
309 |
| NEO |
- |
| M1 |
17.400 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-06-17.0000000 |
| e |
0.38472732 |
| q (au) |
2.220496 |
| a (au) |
3.608962 |
| i (deg) |
11.747463 |
| Ω (om, deg) |
261.053847 |
| ω (w, deg) |
98.301249 |
| M (ma, deg) |
145.008703 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.237 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.237 |
| n |
6.000 |
| 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) |
| 2026-09-25 00:00 |
11:25:03.74 |
-06:54:21.0 |
HIP 55635 |
23.07 |
| 2026-09-25 12:00 |
11:25:28.14 |
-06:57:05.5 |
HIP 55635 |
26.72 |
| 2026-09-26 00:00 |
11:25:52.51 |
-06:59:50.3 |
HIP 55804 |
31.31 |
| 2026-09-26 12:00 |
11:26:16.87 |
-07:02:35.3 |
HIP 55804 |
28.61 |
| 2026-09-27 00:00 |
11:26:41.21 |
-07:05:20.5 |
HIP 55969 |
25.33 |
| 2026-09-27 12:00 |
11:27:05.53 |
-07:08:05.9 |
HIP 55969 |
18.73 |
| 2026-09-28 00:00 |
11:27:29.83 |
-07:10:51.6 |
HIP 55969 |
12.18 |
| 2026-09-28 12:00 |
11:27:54.10 |
-07:13:37.4 |
HIP 55969 |
5.80 |
| 2026-09-29 00:00 |
11:28:18.36 |
-07:16:23.5 |
HIP 55969 |
2.57 |
| 2026-09-29 12:00 |
11:28:42.59 |
-07:19:09.8 |
HIP 55969 |
8.20 |
| 2026-09-30 00:00 |
11:29:06.80 |
-07:21:56.3 |
HIP 55969 |
14.67 |
| 2026-09-30 12:00 |
11:29:30.99 |
-07:24:43.0 |
HIP 55969 |
21.23 |
| 2026-10-01 00:00 |
11:29:55.15 |
-07:27:30.0 |
HIP 55969 |
27.80 |
| 2026-10-01 12:00 |
11:30:19.29 |
-07:30:17.1 |
HIP 55969 |
34.38 |
| 2026-10-02 00:00 |
11:30:43.41 |
-07:33:04.4 |
HIP 56157 |
32.68 |
| 2026-10-02 12:00 |
11:31:07.50 |
-07:35:51.9 |
HIP 56318 |
28.36 |
| 2026-10-03 00:00 |
11:31:31.56 |
-07:38:39.6 |
HIP 56318 |
21.80 |
| 2026-10-03 12:00 |
11:31:55.60 |
-07:41:27.4 |
HIP 56318 |
15.25 |
| 2026-10-04 00:00 |
11:32:19.61 |
-07:44:15.5 |
HIP 56318 |
8.77 |
| 2026-10-04 12:00 |
11:32:43.59 |
-07:47:03.7 |
HIP 56318 |
2.77 |
| 2026-10-05 00:00 |
11:33:07.55 |
-07:49:52.1 |
HIP 56318 |
4.96 |
| 2026-10-05 12:00 |
11:33:31.47 |
-07:52:40.6 |
HIP 56318 |
11.29 |
| 2026-10-06 00:00 |
11:33:55.37 |
-07:55:29.3 |
HIP 56490 |
13.88 |
| 2026-10-06 12:00 |
11:34:19.23 |
-07:58:18.2 |
HIP 56490 |
8.41 |
| 2026-10-07 00:00 |
11:34:43.07 |
-08:01:07.2 |
HIP 56490 |
5.88 |
| 2026-10-07 12:00 |
11:35:06.87 |
-08:03:56.4 |
HIP 56490 |
9.16 |
| 2026-10-08 00:00 |
11:35:30.64 |
-08:06:45.7 |
HIP 56490 |
14.78 |
| 2026-10-08 12:00 |
11:35:54.38 |
-08:09:35.1 |
HIP 56490 |
20.93 |
| 2026-10-09 00:00 |
11:36:18.08 |
-08:12:24.7 |
HIP 56718 |
21.18 |
| 2026-10-09 12:00 |
11:36:41.75 |
-08:15:14.4 |
HIP 56718 |
16.27 |
| 2026-10-10 00:00 |
11:37:05.39 |
-08:18:04.2 |
HIP 56718 |
12.88 |
| 2026-10-10 12:00 |
11:37:28.98 |
-08:20:54.1 |
HIP 56718 |
12.31 |
| 2026-10-11 00:00 |
11:37:52.54 |
-08:23:44.2 |
HIP 56718 |
14.88 |
| 2026-10-11 12:00 |
11:38:16.07 |
-08:26:34.3 |
HIP 56718 |
19.37 |
| 2026-10-12 00:00 |
11:38:39.55 |
-08:29:24.6 |
HIP 56718 |
24.75 |
| 2026-10-12 12:00 |
11:39:03.00 |
-08:32:14.9 |
HIP 56960 |
24.46 |
| 2026-10-13 00:00 |
11:39:26.41 |
-08:35:05.3 |
HIP 56960 |
20.42 |
| 2026-10-13 12:00 |
11:39:49.77 |
-08:37:55.8 |
HIP 56960 |
17.86 |
| 2026-10-14 00:00 |
11:40:13.10 |
-08:40:46.4 |
HIP 56977 |
13.34 |
| 2026-10-14 12:00 |
11:40:36.38 |
-08:43:37.1 |
HIP 56977 |
7.81 |
| 2026-10-15 00:00 |
11:40:59.63 |
-08:46:27.8 |
HIP 56977 |
5.11 |
| 2026-10-15 12:00 |
11:41:22.82 |
-08:49:18.6 |
HIP 56977 |
8.55 |
| 2026-10-16 00:00 |
11:41:45.98 |
-08:52:09.5 |
HIP 57049 |
12.46 |