| Parameter |
Value |
| Designation |
344P/Read |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-10-30T18:40:50.831040Z |
| Orbit solution date (soln_date, UTC) |
2026-09-21T07:12:14Z |
| Obs used |
550 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
20.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-06-17.0000000 |
| e |
0.42232377 |
| q (au) |
2.822582 |
| a (au) |
4.886097 |
| i (deg) |
3.485144 |
| Ω (om, deg) |
273.261326 |
| ω (w, deg) |
140.420077 |
| M (ma, deg) |
180.884886 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-09-20 00:00 |
22:47:57.55 |
-02:33:03.3 |
HIP 112494 |
14.71 |
| 2026-09-20 12:00 |
22:47:40.02 |
-02:34:53.8 |
HIP 112494 |
10.28 |
| 2026-09-21 00:00 |
22:47:22.61 |
-02:36:44.1 |
HIP 112494 |
6.35 |
| 2026-09-21 12:00 |
22:47:05.31 |
-02:38:34.2 |
HIP 112494 |
4.41 |
| 2026-09-22 00:00 |
22:46:48.13 |
-02:40:24.0 |
HIP 112494 |
6.50 |
| 2026-09-22 12:00 |
22:46:31.08 |
-02:42:13.6 |
HIP 112494 |
10.39 |
| 2026-09-23 00:00 |
22:46:14.16 |
-02:44:02.8 |
HIP 112494 |
14.69 |
| 2026-09-23 12:00 |
22:45:57.37 |
-02:45:51.7 |
HIP 112326 |
14.49 |
| 2026-09-24 00:00 |
22:45:40.72 |
-02:47:40.3 |
HIP 112326 |
11.99 |
| 2026-09-24 12:00 |
22:45:24.22 |
-02:49:28.4 |
HIP 112326 |
10.90 |
| 2026-09-25 00:00 |
22:45:07.85 |
-02:51:16.2 |
HIP 112326 |
11.59 |
| 2026-09-25 12:00 |
22:44:51.64 |
-02:53:03.5 |
HIP 112271 |
13.10 |
| 2026-09-26 00:00 |
22:44:35.58 |
-02:54:50.3 |
HIP 112271 |
10.16 |
| 2026-09-26 12:00 |
22:44:19.68 |
-02:56:36.6 |
HIP 112271 |
8.55 |
| 2026-09-27 00:00 |
22:44:03.94 |
-02:58:22.4 |
HIP 112271 |
8.98 |
| 2026-09-27 12:00 |
22:43:48.37 |
-03:00:07.7 |
HIP 112271 |
11.15 |
| 2026-09-28 00:00 |
22:43:32.97 |
-03:01:52.4 |
HIP 112271 |
14.26 |
| 2026-09-28 12:00 |
22:43:17.73 |
-03:03:36.5 |
HIP 112271 |
17.79 |
| 2026-09-29 00:00 |
22:43:02.68 |
-03:05:20.0 |
HIP 112271 |
21.51 |
| 2026-09-29 12:00 |
22:42:47.80 |
-03:07:02.8 |
HIP 112079 |
23.70 |
| 2026-09-30 00:00 |
22:42:33.11 |
-03:08:45.0 |
HIP 112079 |
20.74 |
| 2026-09-30 12:00 |
22:42:18.61 |
-03:10:26.5 |
HIP 112079 |
18.21 |
| 2026-10-01 00:00 |
22:42:04.29 |
-03:12:07.2 |
HIP 112079 |
16.29 |
| 2026-10-01 12:00 |
22:41:50.17 |
-03:13:47.3 |
HIP 112079 |
15.18 |
| 2026-10-02 00:00 |
22:41:36.25 |
-03:15:26.5 |
HIP 112079 |
15.01 |
| 2026-10-02 12:00 |
22:41:22.53 |
-03:17:05.0 |
HIP 112079 |
15.78 |
| 2026-10-03 00:00 |
22:41:09.02 |
-03:18:42.6 |
HIP 111965 |
15.46 |
| 2026-10-03 12:00 |
22:40:55.71 |
-03:20:19.4 |
HIP 111965 |
13.07 |
| 2026-10-04 00:00 |
22:40:42.61 |
-03:21:55.3 |
HIP 111965 |
11.40 |
| 2026-10-04 12:00 |
22:40:29.73 |
-03:23:30.4 |
HIP 111965 |
10.75 |
| 2026-10-05 00:00 |
22:40:17.07 |
-03:25:04.5 |
HIP 111965 |
11.23 |
| 2026-10-05 12:00 |
22:40:04.63 |
-03:26:37.7 |
HIP 111965 |
12.68 |
| 2026-10-06 00:00 |
22:39:52.42 |
-03:28:10.0 |
HIP 111840 |
12.37 |
| 2026-10-06 12:00 |
22:39:40.43 |
-03:29:41.2 |
HIP 111840 |
9.17 |
| 2026-10-07 00:00 |
22:39:28.67 |
-03:31:11.4 |
HIP 111840 |
6.19 |
| 2026-10-07 12:00 |
22:39:17.15 |
-03:32:40.7 |
HIP 111840 |
3.79 |
| 2026-10-08 00:00 |
22:39:05.87 |
-03:34:08.8 |
HIP 111840 |
3.34 |
| 2026-10-08 12:00 |
22:38:54.83 |
-03:35:35.9 |
HIP 111840 |
5.24 |
| 2026-10-09 00:00 |
22:38:44.03 |
-03:37:01.8 |
HIP 111840 |
7.89 |
| 2026-10-09 12:00 |
22:38:33.48 |
-03:38:26.7 |
HIP 111840 |
10.69 |
| 2026-10-10 00:00 |
22:38:23.18 |
-03:39:50.4 |
HIP 111840 |
13.50 |
| 2026-10-10 12:00 |
22:38:13.13 |
-03:41:12.9 |
HIP 111840 |
16.29 |
| 2026-10-11 00:00 |
22:38:03.33 |
-03:42:34.3 |
HIP 111840 |
19.04 |