| Parameter |
Value |
| Designation |
167P/CINEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2001-04-09T20:35:06.921600Z |
| Orbit solution date (soln_date, UTC) |
2025-12-10T08:26:50Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2004-03-28.0000000 |
| e |
0.27000580 |
| q (au) |
11.783420 |
| a (au) |
16.141799 |
| i (deg) |
19.126732 |
| Ω (om, deg) |
295.837117 |
| ω (w, deg) |
343.646343 |
| M (ma, deg) |
16.461207 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.536 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.536 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.918 |
| k |
0.800 |
| δ90 |
9.904 |
| 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 |
04:38:32.70 |
+34:35:41.2 |
HIP 21491 |
29.16 |
| 2026-03-26 12:00 |
04:38:36.86 |
+34:35:26.7 |
HIP 21697 |
29.86 |
| 2026-03-27 00:00 |
04:38:41.07 |
+34:35:12.3 |
HIP 21697 |
29.32 |
| 2026-03-27 12:00 |
04:38:45.34 |
+34:34:58.1 |
HIP 21697 |
28.80 |
| 2026-03-28 00:00 |
04:38:49.65 |
+34:34:44.1 |
HIP 21697 |
28.30 |
| 2026-03-28 12:00 |
04:38:54.02 |
+34:34:30.2 |
HIP 21697 |
27.82 |
| 2026-03-29 00:00 |
04:38:58.44 |
+34:34:16.5 |
HIP 21697 |
27.36 |
| 2026-03-29 12:00 |
04:39:02.90 |
+34:34:03.0 |
HIP 21697 |
26.93 |
| 2026-03-30 00:00 |
04:39:07.42 |
+34:33:49.6 |
HIP 21697 |
26.53 |
| 2026-03-30 12:00 |
04:39:11.98 |
+34:33:36.4 |
HIP 21697 |
26.15 |
| 2026-03-31 00:00 |
04:39:16.60 |
+34:33:23.4 |
HIP 21697 |
25.81 |
| 2026-03-31 12:00 |
04:39:21.26 |
+34:33:10.5 |
HIP 21822 |
25.39 |
| 2026-04-01 00:00 |
04:39:25.98 |
+34:32:57.8 |
HIP 21822 |
24.52 |
| 2026-04-01 12:00 |
04:39:30.74 |
+34:32:45.3 |
HIP 21822 |
23.65 |
| 2026-04-02 00:00 |
04:39:35.55 |
+34:32:32.9 |
HIP 21822 |
22.77 |
| 2026-04-02 12:00 |
04:39:40.40 |
+34:32:20.7 |
HIP 21822 |
21.90 |
| 2026-04-03 00:00 |
04:39:45.31 |
+34:32:08.6 |
HIP 21822 |
21.03 |
| 2026-04-03 12:00 |
04:39:50.26 |
+34:31:56.7 |
HIP 21822 |
20.17 |
| 2026-04-04 00:00 |
04:39:55.25 |
+34:31:45.0 |
HIP 21822 |
19.31 |
| 2026-04-04 12:00 |
04:40:00.30 |
+34:31:33.5 |
HIP 21822 |
18.46 |
| 2026-04-05 00:00 |
04:40:05.39 |
+34:31:22.1 |
HIP 21822 |
17.63 |
| 2026-04-05 12:00 |
04:40:10.52 |
+34:31:10.9 |
HIP 21822 |
16.81 |
| 2026-04-06 00:00 |
04:40:15.71 |
+34:30:59.8 |
HIP 21822 |
16.01 |
| 2026-04-06 12:00 |
04:40:20.93 |
+34:30:48.9 |
HIP 21822 |
15.24 |
| 2026-04-07 00:00 |
04:40:26.21 |
+34:30:38.2 |
HIP 21822 |
14.50 |
| 2026-04-07 12:00 |
04:40:31.52 |
+34:30:27.6 |
HIP 21822 |
13.80 |
| 2026-04-08 00:00 |
04:40:36.89 |
+34:30:17.2 |
HIP 21822 |
13.14 |
| 2026-04-08 12:00 |
04:40:42.29 |
+34:30:07.0 |
HIP 21822 |
12.55 |
| 2026-04-09 00:00 |
04:40:47.74 |
+34:29:56.9 |
HIP 21822 |
12.02 |
| 2026-04-09 12:00 |
04:40:53.23 |
+34:29:47.0 |
HIP 21822 |
11.58 |
| 2026-04-10 00:00 |
04:40:58.77 |
+34:29:37.3 |
HIP 21822 |
11.22 |
| 2026-04-10 12:00 |
04:41:04.35 |
+34:29:27.7 |
HIP 21822 |
10.98 |
| 2026-04-11 00:00 |
04:41:09.97 |
+34:29:18.3 |
HIP 21822 |
10.84 |
| 2026-04-11 12:00 |
04:41:15.64 |
+34:29:09.1 |
HIP 21822 |
10.83 |
| 2026-04-12 00:00 |
04:41:21.34 |
+34:29:00.0 |
HIP 21822 |
10.94 |
| 2026-04-12 12:00 |
04:41:27.09 |
+34:28:51.1 |
HIP 21822 |
11.18 |
| 2026-04-13 00:00 |
04:41:32.88 |
+34:28:42.4 |
HIP 21822 |
11.53 |
| 2026-04-13 12:00 |
04:41:38.71 |
+34:28:33.8 |
HIP 21822 |
12.00 |
| 2026-04-14 00:00 |
04:41:44.59 |
+34:28:25.4 |
HIP 21822 |
12.56 |
| 2026-04-14 12:00 |
04:41:50.50 |
+34:28:17.2 |
HIP 21822 |
13.22 |
| 2026-04-15 00:00 |
04:41:56.45 |
+34:28:09.1 |
HIP 21822 |
13.95 |
| 2026-04-15 12:00 |
04:42:02.44 |
+34:28:01.2 |
HIP 21822 |
14.76 |
| 2026-04-16 00:00 |
04:42:08.48 |
+34:27:53.4 |
HIP 21822 |
15.62 |