347P/PANSTARRS
| 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) |
| 2026-02-03 00:00 |
10:31:34.50 |
-05:47:39.0 |
HIP 51602 |
21.55 |
| 2026-02-03 12:00 |
10:31:17.89 |
-05:46:57.8 |
HIP 51602 |
24.82 |
| 2026-02-04 00:00 |
10:31:01.18 |
-05:46:15.0 |
HIP 51602 |
28.37 |
| 2026-02-04 12:00 |
10:30:44.34 |
-05:45:30.6 |
HIP 51602 |
32.13 |
| 2026-02-05 00:00 |
10:30:27.40 |
-05:44:44.7 |
HIP 51298 |
32.52 |
| 2026-02-05 12:00 |
10:30:10.35 |
-05:43:57.2 |
HIP 51298 |
28.72 |
| 2026-02-06 00:00 |
10:29:53.19 |
-05:43:08.1 |
HIP 51298 |
25.06 |
| 2026-02-06 12:00 |
10:29:35.92 |
-05:42:17.5 |
HIP 51298 |
21.62 |
| 2026-02-07 00:00 |
10:29:18.56 |
-05:41:25.4 |
HIP 51298 |
18.55 |
| 2026-02-07 12:00 |
10:29:01.10 |
-05:40:31.7 |
HIP 51298 |
16.07 |
| 2026-02-08 00:00 |
10:28:43.54 |
-05:39:36.4 |
HIP 51298 |
14.53 |
| 2026-02-08 12:00 |
10:28:25.89 |
-05:38:39.7 |
HIP 51298 |
14.26 |
| 2026-02-09 00:00 |
10:28:08.15 |
-05:37:41.4 |
HIP 51298 |
15.35 |
| 2026-02-09 12:00 |
10:27:50.32 |
-05:36:41.7 |
HIP 51156 |
13.35 |
| 2026-02-10 00:00 |
10:27:32.41 |
-05:35:40.4 |
HIP 51156 |
9.64 |
| 2026-02-10 12:00 |
10:27:14.42 |
-05:34:37.7 |
HIP 51156 |
7.03 |
| 2026-02-11 00:00 |
10:26:56.36 |
-05:33:33.5 |
HIP 51156 |
6.98 |
| 2026-02-11 12:00 |
10:26:38.22 |
-05:32:27.8 |
HIP 51156 |
9.55 |
| 2026-02-12 00:00 |
10:26:20.00 |
-05:31:20.7 |
HIP 51156 |
13.33 |
| 2026-02-12 12:00 |
10:26:01.72 |
-05:30:12.1 |
HIP 51156 |
17.57 |
| 2026-02-13 00:00 |
10:25:43.38 |
-05:29:02.1 |
HIP 50965 |
16.94 |
| 2026-02-13 12:00 |
10:25:24.97 |
-05:27:50.7 |
HIP 50965 |
12.67 |
| 2026-02-14 00:00 |
10:25:06.51 |
-05:26:37.9 |
HIP 50965 |
8.88 |
| 2026-02-14 12:00 |
10:24:47.99 |
-05:25:23.7 |
HIP 50965 |
6.51 |
| 2026-02-15 00:00 |
10:24:29.42 |
-05:24:08.1 |
HIP 50965 |
7.20 |
| 2026-02-15 12:00 |
10:24:10.80 |
-05:22:51.2 |
HIP 50965 |
10.38 |
| 2026-02-16 00:00 |
10:23:52.13 |
-05:21:32.9 |
HIP 50965 |
14.51 |
| 2026-02-16 12:00 |
10:23:33.43 |
-05:20:13.3 |
HIP 50965 |
18.99 |
| 2026-02-17 00:00 |
10:23:14.68 |
-05:18:52.4 |
HIP 50965 |
23.64 |
| 2026-02-17 12:00 |
10:22:55.90 |
-05:17:30.2 |
HIP 50930 |
28.03 |
| 2026-02-18 00:00 |
10:22:37.10 |
-05:16:06.7 |
HIP 50692 |
24.05 |
| 2026-02-18 12:00 |
10:22:18.26 |
-05:14:42.0 |
HIP 50692 |
20.42 |
| 2026-02-19 00:00 |
10:21:59.40 |
-05:13:16.0 |
HIP 50692 |
17.45 |
| 2026-02-19 12:00 |
10:21:40.52 |
-05:11:48.7 |
HIP 50692 |
15.50 |
| 2026-02-20 00:00 |
10:21:21.62 |
-05:10:20.3 |
HIP 50692 |
15.00 |
| 2026-02-20 12:00 |
10:21:02.71 |
-05:08:50.6 |
HIP 50658 |
14.81 |
| 2026-02-21 00:00 |
10:20:43.78 |
-05:07:19.8 |
HIP 50658 |
15.59 |
| 2026-02-21 12:00 |
10:20:24.86 |
-05:05:47.9 |
HIP 50552 |
13.08 |
| 2026-02-22 00:00 |
10:20:05.93 |
-05:04:14.8 |
HIP 50552 |
8.62 |
| 2026-02-22 12:00 |
10:19:46.99 |
-05:02:40.5 |
HIP 50552 |
5.18 |
| 2026-02-23 00:00 |
10:19:28.07 |
-05:01:05.2 |
HIP 50552 |
5.38 |
| 2026-02-23 12:00 |
10:19:09.15 |
-04:59:28.8 |
HIP 50552 |
8.99 |
| 2026-02-24 00:00 |
10:18:50.24 |
-04:57:51.4 |
HIP 50552 |
13.50 |