| 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 · 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) |
| 2026-03-26 00:00 |
17:29:06.70 |
-39:11:28.3 |
HIP 85747 |
25.84 |
| 2026-03-26 12:00 |
17:29:07.34 |
-39:13:06.7 |
HIP 85747 |
25.86 |
| 2026-03-27 00:00 |
17:29:07.79 |
-39:14:45.0 |
HIP 85747 |
26.02 |
| 2026-03-27 12:00 |
17:29:08.05 |
-39:16:23.3 |
HIP 85411 |
25.67 |
| 2026-03-28 00:00 |
17:29:08.11 |
-39:18:01.4 |
HIP 85411 |
24.90 |
| 2026-03-28 12:00 |
17:29:07.98 |
-39:19:39.5 |
HIP 85411 |
24.19 |
| 2026-03-29 00:00 |
17:29:07.66 |
-39:21:17.5 |
HIP 85627 |
22.71 |
| 2026-03-29 12:00 |
17:29:07.14 |
-39:22:55.4 |
HIP 85627 |
21.24 |
| 2026-03-30 00:00 |
17:29:06.43 |
-39:24:33.2 |
HIP 85627 |
19.82 |
| 2026-03-30 12:00 |
17:29:05.53 |
-39:26:10.9 |
HIP 85627 |
18.45 |
| 2026-03-31 00:00 |
17:29:04.44 |
-39:27:48.4 |
HIP 85627 |
17.15 |
| 2026-03-31 12:00 |
17:29:03.15 |
-39:29:25.9 |
HIP 85627 |
15.94 |
| 2026-04-01 00:00 |
17:29:01.67 |
-39:31:03.2 |
HIP 85627 |
14.83 |
| 2026-04-01 12:00 |
17:28:59.99 |
-39:32:40.4 |
HIP 85627 |
13.87 |
| 2026-04-02 00:00 |
17:28:58.12 |
-39:34:17.4 |
HIP 85627 |
13.07 |
| 2026-04-02 12:00 |
17:28:56.05 |
-39:35:54.3 |
HIP 85627 |
12.47 |
| 2026-04-03 00:00 |
17:28:53.79 |
-39:37:31.1 |
HIP 85627 |
12.12 |
| 2026-04-03 12:00 |
17:28:51.33 |
-39:39:07.6 |
HIP 85627 |
12.02 |
| 2026-04-04 00:00 |
17:28:48.68 |
-39:40:44.0 |
HIP 85627 |
12.19 |
| 2026-04-04 12:00 |
17:28:45.84 |
-39:42:20.3 |
HIP 85627 |
12.63 |
| 2026-04-05 00:00 |
17:28:42.80 |
-39:43:56.3 |
HIP 85627 |
13.30 |
| 2026-04-05 12:00 |
17:28:39.56 |
-39:45:32.2 |
HIP 85627 |
14.19 |
| 2026-04-06 00:00 |
17:28:36.13 |
-39:47:07.8 |
HIP 85627 |
15.25 |
| 2026-04-06 12:00 |
17:28:32.50 |
-39:48:43.3 |
HIP 85627 |
16.46 |
| 2026-04-07 00:00 |
17:28:28.68 |
-39:50:18.5 |
HIP 85627 |
17.78 |
| 2026-04-07 12:00 |
17:28:24.66 |
-39:51:53.6 |
HIP 85627 |
19.21 |
| 2026-04-08 00:00 |
17:28:20.44 |
-39:53:28.3 |
HIP 85627 |
20.71 |
| 2026-04-08 12:00 |
17:28:16.03 |
-39:55:02.9 |
HIP 85627 |
22.29 |
| 2026-04-09 00:00 |
17:28:11.43 |
-39:56:37.2 |
HIP 85627 |
23.92 |
| 2026-04-09 12:00 |
17:28:06.63 |
-39:58:11.3 |
HIP 85584 |
23.78 |
| 2026-04-10 00:00 |
17:28:01.63 |
-39:59:45.1 |
HIP 85584 |
23.15 |
| 2026-04-10 12:00 |
17:27:56.44 |
-40:01:18.6 |
HIP 85584 |
22.69 |
| 2026-04-11 00:00 |
17:27:51.05 |
-40:02:51.9 |
HIP 85584 |
22.40 |
| 2026-04-11 12:00 |
17:27:45.47 |
-40:04:24.9 |
HIP 85584 |
22.30 |
| 2026-04-12 00:00 |
17:27:39.69 |
-40:05:57.5 |
HIP 85584 |
22.38 |
| 2026-04-12 12:00 |
17:27:33.72 |
-40:07:29.9 |
HIP 85584 |
22.67 |
| 2026-04-13 00:00 |
17:27:27.56 |
-40:09:02.0 |
HIP 85584 |
23.14 |
| 2026-04-13 12:00 |
17:27:21.20 |
-40:10:33.7 |
HIP 85584 |
23.80 |
| 2026-04-14 00:00 |
17:27:14.64 |
-40:12:05.1 |
HIP 85584 |
24.63 |
| 2026-04-14 12:00 |
17:27:07.90 |
-40:13:36.2 |
HIP 85366 |
24.99 |
| 2026-04-15 00:00 |
17:27:00.95 |
-40:15:07.0 |
HIP 85366 |
23.24 |
| 2026-04-15 12:00 |
17:26:53.82 |
-40:16:37.3 |
HIP 85366 |
21.54 |
| 2026-04-16 00:00 |
17:26:46.49 |
-40:18:07.3 |
HIP 85366 |
19.90 |