| Parameter |
Value |
| Designation |
453P/WISE-Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-03-02T23:53:38.328000Z |
| Orbit solution date (soln_date, UTC) |
2023-08-06T18:13:35Z |
| Obs used |
324 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
16.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-11-01T07:57:29.203200Z |
| Discovery magnitude (MPC) |
19.39 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-12.0000000 |
| e |
0.58243939 |
| q (au) |
2.278541 |
| a (au) |
5.456791 |
| i (deg) |
27.067709 |
| Ω (om, deg) |
42.897454 |
| ω (w, deg) |
70.816364 |
| M (ma, deg) |
349.020743 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.183 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.183 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
16:38:18.34 |
-39:39:15.0 |
HIP 81488 |
7.31 |
| 2026-09-20 12:00 |
16:38:28.95 |
-39:38:48.9 |
HIP 81488 |
6.04 |
| 2026-09-21 00:00 |
16:38:39.71 |
-39:38:23.1 |
HIP 81488 |
5.33 |
| 2026-09-21 12:00 |
16:38:50.59 |
-39:37:57.8 |
HIP 81488 |
5.43 |
| 2026-09-22 00:00 |
16:39:01.62 |
-39:37:32.9 |
HIP 81488 |
6.33 |
| 2026-09-22 12:00 |
16:39:12.78 |
-39:37:08.4 |
HIP 81488 |
7.77 |
| 2026-09-23 00:00 |
16:39:24.07 |
-39:36:44.4 |
HIP 81488 |
9.53 |
| 2026-09-23 12:00 |
16:39:35.49 |
-39:36:20.8 |
HIP 81488 |
11.47 |
| 2026-09-24 00:00 |
16:39:47.05 |
-39:35:57.6 |
HIP 81488 |
13.53 |
| 2026-09-24 12:00 |
16:39:58.74 |
-39:35:34.8 |
HIP 81488 |
15.67 |
| 2026-09-25 00:00 |
16:40:10.56 |
-39:35:12.4 |
HIP 81488 |
17.88 |
| 2026-09-25 12:00 |
16:40:22.51 |
-39:34:50.4 |
HIP 81643 |
18.51 |
| 2026-09-26 00:00 |
16:40:34.59 |
-39:34:28.9 |
HIP 81643 |
18.53 |
| 2026-09-26 12:00 |
16:40:46.79 |
-39:34:07.8 |
HIP 81643 |
18.85 |
| 2026-09-27 00:00 |
16:40:59.12 |
-39:33:47.1 |
HIP 81643 |
19.44 |
| 2026-09-27 12:00 |
16:41:11.58 |
-39:33:26.8 |
HIP 81643 |
20.31 |
| 2026-09-28 00:00 |
16:41:24.17 |
-39:33:07.0 |
HIP 81845 |
18.97 |
| 2026-09-28 12:00 |
16:41:36.88 |
-39:32:47.5 |
HIP 81845 |
16.50 |
| 2026-09-29 00:00 |
16:41:49.72 |
-39:32:28.5 |
HIP 81845 |
14.00 |
| 2026-09-29 12:00 |
16:42:02.67 |
-39:32:09.9 |
HIP 81845 |
11.49 |
| 2026-09-30 00:00 |
16:42:15.76 |
-39:31:51.7 |
HIP 81845 |
8.95 |
| 2026-09-30 12:00 |
16:42:28.96 |
-39:31:33.9 |
HIP 81845 |
6.39 |
| 2026-10-01 00:00 |
16:42:42.28 |
-39:31:16.5 |
HIP 81845 |
3.80 |
| 2026-10-01 12:00 |
16:42:55.73 |
-39:30:59.6 |
HIP 81845 |
1.22 |
| 2026-10-02 00:00 |
16:43:09.30 |
-39:30:43.0 |
HIP 81845 |
1.48 |
| 2026-10-02 12:00 |
16:43:22.98 |
-39:30:26.9 |
HIP 81896 |
3.76 |
| 2026-10-03 00:00 |
16:43:36.79 |
-39:30:11.1 |
HIP 81896 |
1.38 |
| 2026-10-03 12:00 |
16:43:50.71 |
-39:29:55.8 |
HIP 81896 |
2.01 |
| 2026-10-04 00:00 |
16:44:04.75 |
-39:29:40.9 |
HIP 81896 |
4.58 |
| 2026-10-04 12:00 |
16:44:18.91 |
-39:29:26.4 |
HIP 81896 |
7.28 |
| 2026-10-05 00:00 |
16:44:33.18 |
-39:29:12.3 |
HIP 81896 |
10.03 |
| 2026-10-05 12:00 |
16:44:47.57 |
-39:28:58.6 |
HIP 81896 |
12.81 |
| 2026-10-06 00:00 |
16:45:02.08 |
-39:28:45.3 |
HIP 81896 |
15.61 |
| 2026-10-06 12:00 |
16:45:16.69 |
-39:28:32.5 |
HIP 81896 |
18.44 |
| 2026-10-07 00:00 |
16:45:31.42 |
-39:28:20.0 |
HIP 82135 |
15.85 |
| 2026-10-07 12:00 |
16:45:46.27 |
-39:28:07.9 |
HIP 82135 |
13.13 |
| 2026-10-08 00:00 |
16:46:01.22 |
-39:27:56.3 |
HIP 82135 |
10.48 |
| 2026-10-08 12:00 |
16:46:16.29 |
-39:27:45.0 |
HIP 82135 |
7.99 |
| 2026-10-09 00:00 |
16:46:31.46 |
-39:27:34.2 |
HIP 82135 |
5.89 |
| 2026-10-09 12:00 |
16:46:46.74 |
-39:27:23.7 |
HIP 82135 |
4.79 |
| 2026-10-10 00:00 |
16:47:02.14 |
-39:27:13.7 |
HIP 82154 |
4.80 |
| 2026-10-10 12:00 |
16:47:17.64 |
-39:27:04.0 |
HIP 82154 |
5.84 |
| 2026-10-11 00:00 |
16:47:33.24 |
-39:26:54.7 |
HIP 82154 |
7.95 |