| Parameter |
Value |
| Designation |
C/2004 X3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-06-17T04:32:11.241600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:45Z |
| Obs used |
241 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
13.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2005-02-19.0000000 |
| e |
1.00642712 |
| q (au) |
4.402298 |
| a (au) |
-684.956072 |
| i (deg) |
81.076589 |
| Ω (om, deg) |
343.047740 |
| ω (w, deg) |
202.126117 |
| M (ma, deg) |
-0.006498 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.298 + 3.877\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.298 |
| n |
3.877 |
| gf |
0.991 |
| gb |
-0.765 |
| k |
0.800 |
| δ90 |
8.584 |
| 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) |
| 2026-09-25 00:00 |
23:13:31.68 |
-23:59:17.1 |
HIP 114606 |
9.51 |
| 2026-09-25 12:00 |
23:13:28.64 |
-23:59:26.0 |
HIP 114606 |
8.94 |
| 2026-09-26 00:00 |
23:13:25.62 |
-23:59:34.7 |
HIP 114606 |
8.40 |
| 2026-09-26 12:00 |
23:13:22.59 |
-23:59:43.2 |
HIP 114606 |
7.89 |
| 2026-09-27 00:00 |
23:13:19.58 |
-23:59:51.6 |
HIP 114606 |
7.42 |
| 2026-09-27 12:00 |
23:13:16.57 |
-23:59:59.8 |
HIP 114606 |
6.99 |
| 2026-09-28 00:00 |
23:13:13.58 |
-24:00:07.9 |
HIP 114606 |
6.60 |
| 2026-09-28 12:00 |
23:13:10.59 |
-24:00:15.7 |
HIP 114606 |
6.28 |
| 2026-09-29 00:00 |
23:13:07.61 |
-24:00:23.4 |
HIP 114606 |
6.02 |
| 2026-09-29 12:00 |
23:13:04.64 |
-24:00:31.0 |
HIP 114606 |
5.83 |
| 2026-09-30 00:00 |
23:13:01.67 |
-24:00:38.3 |
HIP 114606 |
5.72 |
| 2026-09-30 12:00 |
23:12:58.72 |
-24:00:45.5 |
HIP 114606 |
5.70 |
| 2026-10-01 00:00 |
23:12:55.78 |
-24:00:52.5 |
HIP 114606 |
5.76 |
| 2026-10-01 12:00 |
23:12:52.85 |
-24:00:59.3 |
HIP 114606 |
5.91 |
| 2026-10-02 00:00 |
23:12:49.92 |
-24:01:06.0 |
HIP 114606 |
6.12 |
| 2026-10-02 12:00 |
23:12:47.01 |
-24:01:12.5 |
HIP 114606 |
6.40 |
| 2026-10-03 00:00 |
23:12:44.11 |
-24:01:18.8 |
HIP 114606 |
6.74 |
| 2026-10-03 12:00 |
23:12:41.22 |
-24:01:24.9 |
HIP 114606 |
7.13 |
| 2026-10-04 00:00 |
23:12:38.34 |
-24:01:30.9 |
HIP 114606 |
7.55 |
| 2026-10-04 12:00 |
23:12:35.47 |
-24:01:36.6 |
HIP 114606 |
8.01 |
| 2026-10-05 00:00 |
23:12:32.61 |
-24:01:42.2 |
HIP 114606 |
8.49 |
| 2026-10-05 12:00 |
23:12:29.76 |
-24:01:47.6 |
HIP 114606 |
9.00 |
| 2026-10-06 00:00 |
23:12:26.93 |
-24:01:52.8 |
HIP 114606 |
9.52 |
| 2026-10-06 12:00 |
23:12:24.11 |
-24:01:57.9 |
HIP 114606 |
10.06 |
| 2026-10-07 00:00 |
23:12:21.30 |
-24:02:02.7 |
HIP 114606 |
10.61 |
| 2026-10-07 12:00 |
23:12:18.50 |
-24:02:07.4 |
HIP 114606 |
11.16 |
| 2026-10-08 00:00 |
23:12:15.71 |
-24:02:11.9 |
HIP 114606 |
11.73 |
| 2026-10-08 12:00 |
23:12:12.94 |
-24:02:16.2 |
HIP 114606 |
12.30 |
| 2026-10-09 00:00 |
23:12:10.18 |
-24:02:20.3 |
HIP 114606 |
12.87 |
| 2026-10-09 12:00 |
23:12:07.44 |
-24:02:24.2 |
HIP 114606 |
13.45 |
| 2026-10-10 00:00 |
23:12:04.71 |
-24:02:27.9 |
HIP 114606 |
14.03 |
| 2026-10-10 12:00 |
23:12:01.99 |
-24:02:31.5 |
HIP 114606 |
14.61 |
| 2026-10-11 00:00 |
23:11:59.29 |
-24:02:34.8 |
HIP 114568 |
15.14 |
| 2026-10-11 12:00 |
23:11:56.60 |
-24:02:38.0 |
HIP 114568 |
15.48 |
| 2026-10-12 00:00 |
23:11:53.93 |
-24:02:41.0 |
HIP 114568 |
15.83 |
| 2026-10-12 12:00 |
23:11:51.27 |
-24:02:43.8 |
HIP 114568 |
16.19 |
| 2026-10-13 00:00 |
23:11:48.63 |
-24:02:46.4 |
HIP 114568 |
16.57 |
| 2026-10-13 12:00 |
23:11:46.00 |
-24:02:48.8 |
HIP 114568 |
16.95 |
| 2026-10-14 00:00 |
23:11:43.39 |
-24:02:51.0 |
HIP 114568 |
17.34 |
| 2026-10-14 12:00 |
23:11:40.79 |
-24:02:53.0 |
HIP 114568 |
17.74 |
| 2026-10-15 00:00 |
23:11:38.21 |
-24:02:54.9 |
HIP 114568 |
18.14 |
| 2026-10-15 12:00 |
23:11:35.65 |
-24:02:56.5 |
HIP 114568 |
18.55 |
| 2026-10-16 00:00 |
23:11:33.10 |
-24:02:57.9 |
HIP 114568 |
18.96 |