| Parameter |
Value |
| Designation |
450P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2027-01-19T21:20:37.127040Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:42Z |
| Obs used |
891 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
11.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2004-01-13T06:33:13.248000Z |
| Discovery magnitude (MPC) |
18.40 N |
| Discovery observatory (MPC) |
699 · Lowell Observatory-LONEOS |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-09-10.0000000 |
| e |
0.31167393 |
| q (au) |
5.461527 |
| a (au) |
7.934506 |
| i (deg) |
10.561444 |
| Ω (om, deg) |
124.911799 |
| ω (w, deg) |
21.725421 |
| M (ma, deg) |
209.231955 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.113 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.113 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.975 |
| 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 |
07:28:33.10 |
+21:11:08.7 |
HIP 36370 |
17.24 |
| 2026-03-26 12:00 |
07:28:37.49 |
+21:11:34.2 |
HIP 36370 |
17.11 |
| 2026-03-27 00:00 |
07:28:42.07 |
+21:11:59.2 |
HIP 36370 |
17.03 |
| 2026-03-27 12:00 |
07:28:46.83 |
+21:12:23.7 |
HIP 36370 |
17.01 |
| 2026-03-28 00:00 |
07:28:51.78 |
+21:12:47.7 |
HIP 36370 |
17.04 |
| 2026-03-28 12:00 |
07:28:56.91 |
+21:13:11.2 |
HIP 36370 |
17.15 |
| 2026-03-29 00:00 |
07:29:02.23 |
+21:13:34.3 |
HIP 36370 |
17.33 |
| 2026-03-29 12:00 |
07:29:07.73 |
+21:13:56.8 |
HIP 36370 |
17.60 |
| 2026-03-30 00:00 |
07:29:13.42 |
+21:14:18.9 |
HIP 36370 |
17.96 |
| 2026-03-30 12:00 |
07:29:19.28 |
+21:14:40.5 |
HIP 36370 |
18.41 |
| 2026-03-31 00:00 |
07:29:25.34 |
+21:15:01.6 |
HIP 36370 |
18.95 |
| 2026-03-31 12:00 |
07:29:31.57 |
+21:15:22.2 |
HIP 36370 |
19.59 |
| 2026-04-01 00:00 |
07:29:37.98 |
+21:15:42.3 |
HIP 36370 |
20.33 |
| 2026-04-01 12:00 |
07:29:44.58 |
+21:16:02.0 |
HIP 36370 |
21.16 |
| 2026-04-02 00:00 |
07:29:51.35 |
+21:16:21.1 |
HIP 36370 |
22.08 |
| 2026-04-02 12:00 |
07:29:58.30 |
+21:16:39.8 |
HIP 36370 |
23.09 |
| 2026-04-03 00:00 |
07:30:05.44 |
+21:16:58.0 |
HIP 36370 |
24.18 |
| 2026-04-03 12:00 |
07:30:12.75 |
+21:17:15.6 |
HIP 36370 |
25.36 |
| 2026-04-04 00:00 |
07:30:20.24 |
+21:17:32.8 |
HIP 36370 |
26.62 |
| 2026-04-04 12:00 |
07:30:27.90 |
+21:17:49.6 |
HIP 36370 |
27.95 |
| 2026-04-05 00:00 |
07:30:35.74 |
+21:18:05.8 |
HIP 36663 |
28.38 |
| 2026-04-05 12:00 |
07:30:43.76 |
+21:18:21.5 |
HIP 36663 |
26.50 |
| 2026-04-06 00:00 |
07:30:51.95 |
+21:18:36.8 |
HIP 36663 |
24.59 |
| 2026-04-06 12:00 |
07:31:00.32 |
+21:18:51.5 |
HIP 36663 |
22.64 |
| 2026-04-07 00:00 |
07:31:08.87 |
+21:19:05.8 |
HIP 36663 |
20.66 |
| 2026-04-07 12:00 |
07:31:17.58 |
+21:19:19.6 |
HIP 36663 |
18.64 |
| 2026-04-08 00:00 |
07:31:26.47 |
+21:19:32.9 |
HIP 36663 |
16.59 |
| 2026-04-08 12:00 |
07:31:35.53 |
+21:19:45.7 |
HIP 36663 |
14.52 |
| 2026-04-09 00:00 |
07:31:44.77 |
+21:19:58.0 |
HIP 36663 |
12.43 |
| 2026-04-09 12:00 |
07:31:54.17 |
+21:20:09.8 |
HIP 36663 |
10.34 |
| 2026-04-10 00:00 |
07:32:03.75 |
+21:20:21.1 |
HIP 36663 |
8.27 |
| 2026-04-10 12:00 |
07:32:13.49 |
+21:20:32.0 |
HIP 36663 |
6.28 |
| 2026-04-11 00:00 |
07:32:23.41 |
+21:20:42.3 |
HIP 36663 |
4.57 |
| 2026-04-11 12:00 |
07:32:33.49 |
+21:20:52.1 |
HIP 36663 |
3.61 |
| 2026-04-12 00:00 |
07:32:43.74 |
+21:21:01.5 |
HIP 36663 |
4.06 |
| 2026-04-12 12:00 |
07:32:54.16 |
+21:21:10.4 |
HIP 36663 |
5.64 |
| 2026-04-13 00:00 |
07:33:04.75 |
+21:21:18.7 |
HIP 36663 |
7.71 |
| 2026-04-13 12:00 |
07:33:15.50 |
+21:21:26.6 |
HIP 36663 |
10.01 |
| 2026-04-14 00:00 |
07:33:26.42 |
+21:21:34.0 |
HIP 36663 |
12.42 |
| 2026-04-14 12:00 |
07:33:37.50 |
+21:21:40.9 |
HIP 36663 |
14.92 |
| 2026-04-15 00:00 |
07:33:48.74 |
+21:21:47.3 |
HIP 36789 |
14.61 |
| 2026-04-15 12:00 |
07:34:00.15 |
+21:21:53.1 |
HIP 36789 |
14.46 |
| 2026-04-16 00:00 |
07:34:11.73 |
+21:21:58.5 |
HIP 36789 |
14.79 |