C/2004 DZ61 (Catalina-LINEAR)
| Parameter |
Value |
| Designation |
C/2004 DZ61 (Catalina-LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-05-26T20:35:08.787840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:38Z |
| Obs used |
344 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2004-03-21.0000000 |
| e |
0.95602635 |
| q (au) |
2.013330 |
| a (au) |
45.784923 |
| i (deg) |
66.809283 |
| Ω (om, deg) |
172.791834 |
| ω (w, deg) |
44.462016 |
| M (ma, deg) |
359.787298 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.877 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.877 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
00:41:03.99 |
-19:00:50.1 |
HIP 3358 |
23.96 |
| 2026-02-03 12:00 |
00:41:05.78 |
-19:00:26.6 |
HIP 3358 |
23.60 |
| 2026-02-04 00:00 |
00:41:07.59 |
-19:00:03.2 |
HIP 3358 |
23.24 |
| 2026-02-04 12:00 |
00:41:09.42 |
-18:59:39.7 |
HIP 3358 |
22.89 |
| 2026-02-05 00:00 |
00:41:11.28 |
-18:59:16.2 |
HIP 3358 |
22.54 |
| 2026-02-05 12:00 |
00:41:13.15 |
-18:58:52.7 |
HIP 3358 |
22.20 |
| 2026-02-06 00:00 |
00:41:15.05 |
-18:58:29.2 |
HIP 3358 |
21.87 |
| 2026-02-06 12:00 |
00:41:16.97 |
-18:58:05.6 |
HIP 3358 |
21.54 |
| 2026-02-07 00:00 |
00:41:18.91 |
-18:57:42.1 |
HIP 3358 |
21.22 |
| 2026-02-07 12:00 |
00:41:20.87 |
-18:57:18.5 |
HIP 3358 |
20.90 |
| 2026-02-08 00:00 |
00:41:22.85 |
-18:56:54.9 |
HIP 3358 |
20.60 |
| 2026-02-08 12:00 |
00:41:24.85 |
-18:56:31.3 |
HIP 3358 |
20.30 |
| 2026-02-09 00:00 |
00:41:26.87 |
-18:56:07.7 |
HIP 3358 |
20.01 |
| 2026-02-09 12:00 |
00:41:28.91 |
-18:55:44.0 |
HIP 3358 |
19.74 |
| 2026-02-10 00:00 |
00:41:30.97 |
-18:55:20.4 |
HIP 3358 |
19.48 |
| 2026-02-10 12:00 |
00:41:33.05 |
-18:54:56.8 |
HIP 3358 |
19.23 |
| 2026-02-11 00:00 |
00:41:35.15 |
-18:54:33.1 |
HIP 3358 |
18.99 |
| 2026-02-11 12:00 |
00:41:37.27 |
-18:54:09.5 |
HIP 3358 |
18.77 |
| 2026-02-12 00:00 |
00:41:39.41 |
-18:53:45.9 |
HIP 3358 |
18.56 |
| 2026-02-12 12:00 |
00:41:41.56 |
-18:53:22.2 |
HIP 3358 |
18.37 |
| 2026-02-13 00:00 |
00:41:43.74 |
-18:52:58.6 |
HIP 3358 |
18.20 |
| 2026-02-13 12:00 |
00:41:45.94 |
-18:52:35.0 |
HIP 3358 |
18.04 |
| 2026-02-14 00:00 |
00:41:48.15 |
-18:52:11.4 |
HIP 3358 |
17.91 |
| 2026-02-14 12:00 |
00:41:50.38 |
-18:51:47.8 |
HIP 3358 |
17.79 |
| 2026-02-15 00:00 |
00:41:52.63 |
-18:51:24.2 |
HIP 3358 |
17.69 |
| 2026-02-15 12:00 |
00:41:54.90 |
-18:51:00.6 |
HIP 3358 |
17.62 |
| 2026-02-16 00:00 |
00:41:57.19 |
-18:50:37.1 |
HIP 3358 |
17.57 |
| 2026-02-16 12:00 |
00:41:59.50 |
-18:50:13.5 |
HIP 3358 |
17.54 |
| 2026-02-17 00:00 |
00:42:01.82 |
-18:49:50.0 |
HIP 3358 |
17.53 |
| 2026-02-17 12:00 |
00:42:04.16 |
-18:49:26.5 |
HIP 3358 |
17.55 |
| 2026-02-18 00:00 |
00:42:06.52 |
-18:49:03.0 |
HIP 3358 |
17.59 |
| 2026-02-18 12:00 |
00:42:08.89 |
-18:48:39.6 |
HIP 3358 |
17.65 |
| 2026-02-19 00:00 |
00:42:11.28 |
-18:48:16.2 |
HIP 3358 |
17.74 |
| 2026-02-19 12:00 |
00:42:13.69 |
-18:47:52.8 |
HIP 3358 |
17.85 |
| 2026-02-20 00:00 |
00:42:16.11 |
-18:47:29.4 |
HIP 3358 |
17.99 |
| 2026-02-20 12:00 |
00:42:18.55 |
-18:47:06.1 |
HIP 3358 |
18.15 |
| 2026-02-21 00:00 |
00:42:21.01 |
-18:46:42.8 |
HIP 3358 |
18.33 |
| 2026-02-21 12:00 |
00:42:23.48 |
-18:46:19.6 |
HIP 3358 |
18.53 |
| 2026-02-22 00:00 |
00:42:25.97 |
-18:45:56.4 |
HIP 3358 |
18.76 |
| 2026-02-22 12:00 |
00:42:28.48 |
-18:45:33.2 |
HIP 3358 |
19.01 |
| 2026-02-23 00:00 |
00:42:31.00 |
-18:45:10.1 |
HIP 3358 |
19.28 |
| 2026-02-23 12:00 |
00:42:33.53 |
-18:44:47.0 |
HIP 3358 |
19.58 |
| 2026-02-24 00:00 |
00:42:36.08 |
-18:44:24.0 |
HIP 3358 |
19.89 |