| 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 |
0.999 |
| 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) |
| 2026-09-25 00:00 |
18:10:02.97 |
-70:15:33.8 |
HIP 89162 |
9.48 |
| 2026-09-25 12:00 |
18:10:03.41 |
-70:15:02.0 |
HIP 89162 |
9.66 |
| 2026-09-26 00:00 |
18:10:03.93 |
-70:14:30.2 |
HIP 89162 |
9.85 |
| 2026-09-26 12:00 |
18:10:04.51 |
-70:13:58.4 |
HIP 89162 |
10.07 |
| 2026-09-27 00:00 |
18:10:05.17 |
-70:13:26.6 |
HIP 89162 |
10.31 |
| 2026-09-27 12:00 |
18:10:05.90 |
-70:12:54.8 |
HIP 89162 |
10.56 |
| 2026-09-28 00:00 |
18:10:06.70 |
-70:12:23.1 |
HIP 88888 |
10.24 |
| 2026-09-28 12:00 |
18:10:07.56 |
-70:11:51.3 |
HIP 88888 |
9.91 |
| 2026-09-29 00:00 |
18:10:08.50 |
-70:11:19.6 |
HIP 88888 |
9.59 |
| 2026-09-29 12:00 |
18:10:09.51 |
-70:10:47.9 |
HIP 88888 |
9.31 |
| 2026-09-30 00:00 |
18:10:10.59 |
-70:10:16.2 |
HIP 88888 |
9.05 |
| 2026-09-30 12:00 |
18:10:11.74 |
-70:09:44.5 |
HIP 88888 |
8.82 |
| 2026-10-01 00:00 |
18:10:12.95 |
-70:09:12.9 |
HIP 88888 |
8.63 |
| 2026-10-01 12:00 |
18:10:14.24 |
-70:08:41.3 |
HIP 88888 |
8.47 |
| 2026-10-02 00:00 |
18:10:15.60 |
-70:08:09.7 |
HIP 88888 |
8.34 |
| 2026-10-02 12:00 |
18:10:17.02 |
-70:07:38.2 |
HIP 88888 |
8.26 |
| 2026-10-03 00:00 |
18:10:18.52 |
-70:07:06.7 |
HIP 88888 |
8.21 |
| 2026-10-03 12:00 |
18:10:20.08 |
-70:06:35.2 |
HIP 88888 |
8.21 |
| 2026-10-04 00:00 |
18:10:21.71 |
-70:06:03.8 |
HIP 88888 |
8.25 |
| 2026-10-04 12:00 |
18:10:23.41 |
-70:05:32.4 |
HIP 88888 |
8.33 |
| 2026-10-05 00:00 |
18:10:25.18 |
-70:05:01.1 |
HIP 88888 |
8.45 |
| 2026-10-05 12:00 |
18:10:27.02 |
-70:04:29.8 |
HIP 88888 |
8.61 |
| 2026-10-06 00:00 |
18:10:28.93 |
-70:03:58.6 |
HIP 88888 |
8.81 |
| 2026-10-06 12:00 |
18:10:30.90 |
-70:03:27.4 |
HIP 88888 |
9.04 |
| 2026-10-07 00:00 |
18:10:32.94 |
-70:02:56.2 |
HIP 88888 |
9.30 |
| 2026-10-07 12:00 |
18:10:35.05 |
-70:02:25.1 |
HIP 88888 |
9.60 |
| 2026-10-08 00:00 |
18:10:37.23 |
-70:01:54.1 |
HIP 88888 |
9.92 |
| 2026-10-08 12:00 |
18:10:39.48 |
-70:01:23.1 |
HIP 88888 |
10.26 |
| 2026-10-09 00:00 |
18:10:41.79 |
-70:00:52.2 |
HIP 88888 |
10.63 |
| 2026-10-09 12:00 |
18:10:44.17 |
-70:00:21.4 |
HIP 88888 |
11.01 |
| 2026-10-10 00:00 |
18:10:46.62 |
-69:59:50.6 |
HIP 88888 |
11.42 |
| 2026-10-10 12:00 |
18:10:49.13 |
-69:59:19.9 |
HIP 88888 |
11.84 |
| 2026-10-11 00:00 |
18:10:51.71 |
-69:58:49.3 |
HIP 88888 |
12.28 |
| 2026-10-11 12:00 |
18:10:54.35 |
-69:58:18.7 |
HIP 88888 |
12.73 |
| 2026-10-12 00:00 |
18:10:57.06 |
-69:57:48.2 |
HIP 88888 |
13.19 |
| 2026-10-12 12:00 |
18:10:59.84 |
-69:57:17.8 |
HIP 88888 |
13.67 |
| 2026-10-13 00:00 |
18:11:02.68 |
-69:56:47.4 |
HIP 88888 |
14.15 |
| 2026-10-13 12:00 |
18:11:05.59 |
-69:56:17.2 |
HIP 88888 |
14.65 |
| 2026-10-14 00:00 |
18:11:08.56 |
-69:55:47.0 |
HIP 88888 |
15.15 |
| 2026-10-14 12:00 |
18:11:11.59 |
-69:55:16.9 |
HIP 88888 |
15.66 |
| 2026-10-15 00:00 |
18:11:14.69 |
-69:54:46.9 |
HIP 88888 |
16.18 |
| 2026-10-15 12:00 |
18:11:17.85 |
-69:54:17.0 |
HIP 88888 |
16.70 |
| 2026-10-16 00:00 |
18:11:21.08 |
-69:53:47.1 |
HIP 88888 |
17.23 |