| Parameter |
Value |
| Designation |
411P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-01-23T00:31:58.823040Z |
| Orbit solution date (soln_date, UTC) |
2025-04-24T09:42:33Z |
| Obs used |
225 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-11-17T03:08:54.816000Z |
| Discovery magnitude (MPC) |
21.70 T |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-10-24.0000000 |
| e |
0.58199405 |
| q (au) |
2.427425 |
| a (au) |
5.807155 |
| i (deg) |
12.393842 |
| Ω (om, deg) |
77.817671 |
| ω (w, deg) |
46.668360 |
| M (ma, deg) |
173.679301 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.891 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.891 |
| n |
6.000 |
| gf |
0.820 |
| gb |
-0.500 |
| k |
0.962 |
| δ90 |
1.000 |
| 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 |
19:13:03.39 |
-29:49:23.5 |
HIP 94548 |
20.18 |
| 2026-09-20 12:00 |
19:13:01.84 |
-29:49:09.3 |
HIP 94548 |
20.52 |
| 2026-09-21 00:00 |
19:13:00.42 |
-29:48:54.8 |
HIP 94548 |
20.84 |
| 2026-09-21 12:00 |
19:12:59.13 |
-29:48:40.1 |
HIP 94548 |
21.13 |
| 2026-09-22 00:00 |
19:12:57.98 |
-29:48:25.1 |
HIP 94548 |
21.40 |
| 2026-09-22 12:00 |
19:12:56.95 |
-29:48:09.9 |
HIP 94548 |
21.64 |
| 2026-09-23 00:00 |
19:12:56.05 |
-29:47:54.5 |
HIP 94548 |
21.86 |
| 2026-09-23 12:00 |
19:12:55.28 |
-29:47:38.8 |
HIP 94548 |
22.05 |
| 2026-09-24 00:00 |
19:12:54.64 |
-29:47:22.8 |
HIP 94548 |
22.22 |
| 2026-09-24 12:00 |
19:12:54.13 |
-29:47:06.7 |
HIP 94548 |
22.36 |
| 2026-09-25 00:00 |
19:12:53.75 |
-29:46:50.3 |
HIP 94548 |
22.48 |
| 2026-09-25 12:00 |
19:12:53.49 |
-29:46:33.6 |
HIP 94548 |
22.57 |
| 2026-09-26 00:00 |
19:12:53.37 |
-29:46:16.7 |
HIP 94548 |
22.64 |
| 2026-09-26 12:00 |
19:12:53.37 |
-29:45:59.6 |
HIP 94548 |
22.69 |
| 2026-09-27 00:00 |
19:12:53.50 |
-29:45:42.3 |
HIP 94548 |
22.71 |
| 2026-09-27 12:00 |
19:12:53.76 |
-29:45:24.7 |
HIP 94548 |
22.71 |
| 2026-09-28 00:00 |
19:12:54.15 |
-29:45:07.0 |
HIP 94548 |
22.69 |
| 2026-09-28 12:00 |
19:12:54.67 |
-29:44:49.0 |
HIP 94548 |
22.64 |
| 2026-09-29 00:00 |
19:12:55.31 |
-29:44:30.8 |
HIP 94548 |
22.58 |
| 2026-09-29 12:00 |
19:12:56.09 |
-29:44:12.3 |
HIP 94548 |
22.49 |
| 2026-09-30 00:00 |
19:12:56.99 |
-29:43:53.7 |
HIP 94548 |
22.38 |
| 2026-09-30 12:00 |
19:12:58.01 |
-29:43:34.8 |
HIP 94548 |
22.26 |
| 2026-10-01 00:00 |
19:12:59.17 |
-29:43:15.7 |
HIP 94548 |
22.11 |
| 2026-10-01 12:00 |
19:13:00.45 |
-29:42:56.5 |
HIP 94548 |
21.94 |
| 2026-10-02 00:00 |
19:13:01.86 |
-29:42:37.0 |
HIP 94548 |
21.76 |
| 2026-10-02 12:00 |
19:13:03.40 |
-29:42:17.3 |
HIP 94548 |
21.56 |
| 2026-10-03 00:00 |
19:13:05.07 |
-29:41:57.4 |
HIP 94548 |
21.34 |
| 2026-10-03 12:00 |
19:13:06.86 |
-29:41:37.3 |
HIP 94548 |
21.11 |
| 2026-10-04 00:00 |
19:13:08.77 |
-29:41:17.0 |
HIP 94548 |
20.87 |
| 2026-10-04 12:00 |
19:13:10.82 |
-29:40:56.5 |
HIP 94548 |
20.61 |
| 2026-10-05 00:00 |
19:13:12.99 |
-29:40:35.8 |
HIP 94548 |
20.34 |
| 2026-10-05 12:00 |
19:13:15.29 |
-29:40:14.9 |
HIP 94548 |
20.06 |
| 2026-10-06 00:00 |
19:13:17.71 |
-29:39:53.8 |
HIP 94548 |
19.78 |
| 2026-10-06 12:00 |
19:13:20.26 |
-29:39:32.5 |
HIP 94548 |
19.49 |
| 2026-10-07 00:00 |
19:13:22.94 |
-29:39:11.1 |
HIP 94548 |
19.20 |
| 2026-10-07 12:00 |
19:13:25.74 |
-29:38:49.4 |
HIP 94548 |
18.90 |
| 2026-10-08 00:00 |
19:13:28.66 |
-29:38:27.5 |
HIP 94548 |
18.61 |
| 2026-10-08 12:00 |
19:13:31.71 |
-29:38:05.5 |
HIP 94548 |
18.33 |
| 2026-10-09 00:00 |
19:13:34.89 |
-29:37:43.3 |
HIP 94548 |
18.05 |
| 2026-10-09 12:00 |
19:13:38.19 |
-29:37:20.9 |
HIP 94548 |
17.79 |
| 2026-10-10 00:00 |
19:13:41.61 |
-29:36:58.3 |
HIP 94548 |
17.55 |
| 2026-10-10 12:00 |
19:13:45.16 |
-29:36:35.6 |
HIP 94548 |
17.32 |
| 2026-10-11 00:00 |
19:13:48.83 |
-29:36:12.6 |
HIP 94548 |
17.13 |