| 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
$$
M_a = (12.890 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.890 |
| n |
6.000 |
| gf |
0.836 |
| 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) |
| 2026-03-26 00:00 |
19:47:59.60 |
-27:18:31.5 |
HIP 97287 |
22.44 |
| 2026-03-26 12:00 |
19:48:07.96 |
-27:18:38.9 |
HIP 97287 |
24.30 |
| 2026-03-27 00:00 |
19:48:16.20 |
-27:18:46.7 |
HIP 97408 |
25.68 |
| 2026-03-27 12:00 |
19:48:24.35 |
-27:18:54.8 |
HIP 97408 |
25.98 |
| 2026-03-28 00:00 |
19:48:32.38 |
-27:19:03.3 |
HIP 97408 |
26.39 |
| 2026-03-28 12:00 |
19:48:40.31 |
-27:19:12.1 |
HIP 97408 |
26.90 |
| 2026-03-29 00:00 |
19:48:48.14 |
-27:19:21.2 |
HIP 97648 |
26.32 |
| 2026-03-29 12:00 |
19:48:55.85 |
-27:19:30.6 |
HIP 97648 |
24.60 |
| 2026-03-30 00:00 |
19:49:03.46 |
-27:19:40.4 |
HIP 97648 |
22.90 |
| 2026-03-30 12:00 |
19:49:10.96 |
-27:19:50.6 |
HIP 97648 |
21.23 |
| 2026-03-31 00:00 |
19:49:18.36 |
-27:20:01.0 |
HIP 97648 |
19.58 |
| 2026-03-31 12:00 |
19:49:25.64 |
-27:20:11.9 |
HIP 97648 |
17.96 |
| 2026-04-01 00:00 |
19:49:32.81 |
-27:20:23.0 |
HIP 97648 |
16.36 |
| 2026-04-01 12:00 |
19:49:39.88 |
-27:20:34.5 |
HIP 97648 |
14.78 |
| 2026-04-02 00:00 |
19:49:46.84 |
-27:20:46.4 |
HIP 97648 |
13.23 |
| 2026-04-02 12:00 |
19:49:53.68 |
-27:20:58.6 |
HIP 97648 |
11.71 |
| 2026-04-03 00:00 |
19:50:00.42 |
-27:21:11.1 |
HIP 97648 |
10.22 |
| 2026-04-03 12:00 |
19:50:07.04 |
-27:21:24.0 |
HIP 97648 |
8.75 |
| 2026-04-04 00:00 |
19:50:13.55 |
-27:21:37.2 |
HIP 97648 |
7.32 |
| 2026-04-04 12:00 |
19:50:19.95 |
-27:21:50.8 |
HIP 97648 |
5.94 |
| 2026-04-05 00:00 |
19:50:26.23 |
-27:22:04.7 |
HIP 97648 |
4.61 |
| 2026-04-05 12:00 |
19:50:32.41 |
-27:22:19.0 |
HIP 97648 |
3.37 |
| 2026-04-06 00:00 |
19:50:38.47 |
-27:22:33.6 |
HIP 97648 |
2.35 |
| 2026-04-06 12:00 |
19:50:44.41 |
-27:22:48.6 |
HIP 97648 |
1.85 |
| 2026-04-07 00:00 |
19:50:50.24 |
-27:23:03.9 |
HIP 97648 |
2.22 |
| 2026-04-07 12:00 |
19:50:55.96 |
-27:23:19.6 |
HIP 97648 |
3.14 |
| 2026-04-08 00:00 |
19:51:01.56 |
-27:23:35.6 |
HIP 97648 |
4.24 |
| 2026-04-08 12:00 |
19:51:07.05 |
-27:23:52.0 |
HIP 97684 |
4.51 |
| 2026-04-09 00:00 |
19:51:12.41 |
-27:24:08.8 |
HIP 97684 |
4.20 |
| 2026-04-09 12:00 |
19:51:17.67 |
-27:24:25.9 |
HIP 97684 |
4.22 |
| 2026-04-10 00:00 |
19:51:22.80 |
-27:24:43.3 |
HIP 97684 |
4.55 |
| 2026-04-10 12:00 |
19:51:27.82 |
-27:25:01.1 |
HIP 97684 |
5.11 |
| 2026-04-11 00:00 |
19:51:32.72 |
-27:25:19.3 |
HIP 97684 |
5.82 |
| 2026-04-11 12:00 |
19:51:37.50 |
-27:25:37.9 |
HIP 97684 |
6.62 |
| 2026-04-12 00:00 |
19:51:42.16 |
-27:25:56.7 |
HIP 97684 |
7.47 |
| 2026-04-12 12:00 |
19:51:46.70 |
-27:26:16.0 |
HIP 97684 |
8.35 |
| 2026-04-13 00:00 |
19:51:51.12 |
-27:26:35.6 |
HIP 97684 |
9.23 |
| 2026-04-13 12:00 |
19:51:55.42 |
-27:26:55.6 |
HIP 97684 |
10.12 |
| 2026-04-14 00:00 |
19:51:59.60 |
-27:27:15.9 |
HIP 97684 |
11.00 |
| 2026-04-14 12:00 |
19:52:03.66 |
-27:27:36.6 |
HIP 97684 |
11.87 |
| 2026-04-15 00:00 |
19:52:07.60 |
-27:27:57.7 |
HIP 97684 |
12.73 |
| 2026-04-15 12:00 |
19:52:11.42 |
-27:28:19.1 |
HIP 97850 |
12.55 |
| 2026-04-16 00:00 |
19:52:15.11 |
-27:28:40.9 |
HIP 97850 |
11.74 |