C/2004 YJ35 (LINEAR)
| Parameter |
Value |
| Designation |
C/2004 YJ35 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-03-03T03:36:26.084160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:46Z |
| Obs used |
216 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2005-02-01.0000000 |
| e |
0.99986436 |
| q (au) |
1.781202 |
| a (au) |
13132.099127 |
| i (deg) |
52.476403 |
| Ω (om, deg) |
328.249684 |
| ω (w, deg) |
136.897955 |
| M (ma, deg) |
359.999980 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.126 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.126 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
18:33:24.66 |
-69:29:27.9 |
HIP 91146 |
29.22 |
| 2026-02-03 12:00 |
18:33:31.65 |
-69:29:44.0 |
HIP 91146 |
28.74 |
| 2026-02-04 00:00 |
18:33:38.59 |
-69:30:00.3 |
HIP 91146 |
28.27 |
| 2026-02-04 12:00 |
18:33:45.50 |
-69:30:16.8 |
HIP 91146 |
27.80 |
| 2026-02-05 00:00 |
18:33:52.36 |
-69:30:33.5 |
HIP 91146 |
27.33 |
| 2026-02-05 12:00 |
18:33:59.19 |
-69:30:50.4 |
HIP 91146 |
26.87 |
| 2026-02-06 00:00 |
18:34:05.97 |
-69:31:07.5 |
HIP 91146 |
26.42 |
| 2026-02-06 12:00 |
18:34:12.71 |
-69:31:24.9 |
HIP 91146 |
25.97 |
| 2026-02-07 00:00 |
18:34:19.42 |
-69:31:42.4 |
HIP 91146 |
25.53 |
| 2026-02-07 12:00 |
18:34:26.08 |
-69:32:00.2 |
HIP 91146 |
25.10 |
| 2026-02-08 00:00 |
18:34:32.69 |
-69:32:18.1 |
HIP 91146 |
24.67 |
| 2026-02-08 12:00 |
18:34:39.26 |
-69:32:36.3 |
HIP 91146 |
24.25 |
| 2026-02-09 00:00 |
18:34:45.79 |
-69:32:54.7 |
HIP 91146 |
23.84 |
| 2026-02-09 12:00 |
18:34:52.28 |
-69:33:13.2 |
HIP 91146 |
23.44 |
| 2026-02-10 00:00 |
18:34:58.72 |
-69:33:32.0 |
HIP 91146 |
23.04 |
| 2026-02-10 12:00 |
18:35:05.12 |
-69:33:51.0 |
HIP 91146 |
22.66 |
| 2026-02-11 00:00 |
18:35:11.47 |
-69:34:10.1 |
HIP 91146 |
22.28 |
| 2026-02-11 12:00 |
18:35:17.77 |
-69:34:29.5 |
HIP 91146 |
21.91 |
| 2026-02-12 00:00 |
18:35:24.03 |
-69:34:49.1 |
HIP 91146 |
21.55 |
| 2026-02-12 12:00 |
18:35:30.24 |
-69:35:08.8 |
HIP 91146 |
21.19 |
| 2026-02-13 00:00 |
18:35:36.41 |
-69:35:28.8 |
HIP 91146 |
20.85 |
| 2026-02-13 12:00 |
18:35:42.52 |
-69:35:48.9 |
HIP 91146 |
20.52 |
| 2026-02-14 00:00 |
18:35:48.59 |
-69:36:09.3 |
HIP 91146 |
20.20 |
| 2026-02-14 12:00 |
18:35:54.61 |
-69:36:29.8 |
HIP 91146 |
19.89 |
| 2026-02-15 00:00 |
18:36:00.58 |
-69:36:50.5 |
HIP 91146 |
19.59 |
| 2026-02-15 12:00 |
18:36:06.50 |
-69:37:11.5 |
HIP 91146 |
19.31 |
| 2026-02-16 00:00 |
18:36:12.37 |
-69:37:32.6 |
HIP 91146 |
19.03 |
| 2026-02-16 12:00 |
18:36:18.20 |
-69:37:53.8 |
HIP 91146 |
18.77 |
| 2026-02-17 00:00 |
18:36:23.97 |
-69:38:15.3 |
HIP 91146 |
18.52 |
| 2026-02-17 12:00 |
18:36:29.68 |
-69:38:37.0 |
HIP 91146 |
18.29 |
| 2026-02-18 00:00 |
18:36:35.35 |
-69:38:58.8 |
HIP 91146 |
18.06 |
| 2026-02-18 12:00 |
18:36:40.97 |
-69:39:20.8 |
HIP 91146 |
17.85 |
| 2026-02-19 00:00 |
18:36:46.53 |
-69:39:43.0 |
HIP 91146 |
17.66 |
| 2026-02-19 12:00 |
18:36:52.04 |
-69:40:05.3 |
HIP 91146 |
17.48 |
| 2026-02-20 00:00 |
18:36:57.49 |
-69:40:27.9 |
HIP 91146 |
17.31 |
| 2026-02-20 12:00 |
18:37:02.89 |
-69:40:50.6 |
HIP 91146 |
17.16 |
| 2026-02-21 00:00 |
18:37:08.24 |
-69:41:13.5 |
HIP 91146 |
17.02 |
| 2026-02-21 12:00 |
18:37:13.53 |
-69:41:36.5 |
HIP 91146 |
16.90 |
| 2026-02-22 00:00 |
18:37:18.77 |
-69:41:59.8 |
HIP 91146 |
16.80 |
| 2026-02-22 12:00 |
18:37:23.95 |
-69:42:23.2 |
HIP 91146 |
16.71 |
| 2026-02-23 00:00 |
18:37:29.08 |
-69:42:46.7 |
HIP 91146 |
16.63 |
| 2026-02-23 12:00 |
18:37:34.15 |
-69:43:10.4 |
HIP 91146 |
16.57 |
| 2026-02-24 00:00 |
18:37:39.16 |
-69:43:34.3 |
HIP 91146 |
16.53 |