| 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) |
| 2026-05-12 00:00 |
04:48:06.91 |
+34:24:48.1 |
HIP 22363 |
27.15 |
| 2026-05-12 12:00 |
04:48:14.49 |
+34:24:48.5 |
HIP 22363 |
26.66 |
| 2026-05-13 00:00 |
04:48:22.09 |
+34:24:49.0 |
HIP 22363 |
26.25 |
| 2026-05-13 12:00 |
04:48:29.70 |
+34:24:49.7 |
HIP 22363 |
25.93 |
| 2026-05-14 00:00 |
04:48:37.34 |
+34:24:50.6 |
HIP 22363 |
25.70 |
| 2026-05-14 12:00 |
04:48:44.99 |
+34:24:51.6 |
HIP 22363 |
25.58 |
| 2026-05-15 00:00 |
04:48:52.67 |
+34:24:52.7 |
HIP 22363 |
25.55 |
| 2026-05-15 12:00 |
04:49:00.35 |
+34:24:53.9 |
HIP 22363 |
25.63 |
| 2026-05-16 00:00 |
04:49:08.06 |
+34:24:55.3 |
HIP 22363 |
25.80 |
| 2026-05-16 12:00 |
04:49:15.78 |
+34:24:56.9 |
HIP 22363 |
26.08 |
| 2026-05-17 00:00 |
04:49:23.52 |
+34:24:58.6 |
HIP 22363 |
26.45 |
| 2026-05-17 12:00 |
04:49:31.27 |
+34:25:00.4 |
HIP 22363 |
26.91 |
| 2026-05-18 00:00 |
04:49:39.04 |
+34:25:02.3 |
HIP 22363 |
27.47 |
| 2026-05-18 12:00 |
04:49:46.83 |
+34:25:04.4 |
HIP 22558 |
26.88 |
| 2026-05-19 00:00 |
04:49:54.62 |
+34:25:06.6 |
HIP 22558 |
25.83 |
| 2026-05-19 12:00 |
04:50:02.44 |
+34:25:09.0 |
HIP 22558 |
24.83 |
| 2026-05-20 00:00 |
04:50:10.26 |
+34:25:11.5 |
HIP 22558 |
23.90 |
| 2026-05-20 12:00 |
04:50:18.10 |
+34:25:14.1 |
HIP 22558 |
23.05 |
| 2026-05-21 00:00 |
04:50:25.95 |
+34:25:16.9 |
HIP 22558 |
22.29 |
| 2026-05-21 12:00 |
04:50:33.81 |
+34:25:19.7 |
HIP 22639 |
20.70 |
| 2026-05-22 00:00 |
04:50:41.69 |
+34:25:22.8 |
HIP 22639 |
19.07 |
| 2026-05-22 12:00 |
04:50:49.58 |
+34:25:25.9 |
HIP 22639 |
17.45 |
| 2026-05-23 00:00 |
04:50:57.47 |
+34:25:29.2 |
HIP 22639 |
15.82 |
| 2026-05-23 12:00 |
04:51:05.38 |
+34:25:32.6 |
HIP 22639 |
14.19 |
| 2026-05-24 00:00 |
04:51:13.30 |
+34:25:36.1 |
HIP 22639 |
12.56 |
| 2026-05-24 12:00 |
04:51:21.23 |
+34:25:39.8 |
HIP 22639 |
10.92 |
| 2026-05-25 00:00 |
04:51:29.16 |
+34:25:43.6 |
HIP 22639 |
9.29 |
| 2026-05-25 12:00 |
04:51:37.11 |
+34:25:47.5 |
HIP 22639 |
7.65 |
| 2026-05-26 00:00 |
04:51:45.06 |
+34:25:51.6 |
HIP 22639 |
6.01 |
| 2026-05-26 12:00 |
04:51:53.03 |
+34:25:55.7 |
HIP 22639 |
4.38 |
| 2026-05-27 00:00 |
04:52:01.00 |
+34:26:00.0 |
HIP 22639 |
2.75 |
| 2026-05-27 12:00 |
04:52:08.98 |
+34:26:04.5 |
HIP 22639 |
1.16 |
| 2026-05-28 00:00 |
04:52:16.96 |
+34:26:09.0 |
HIP 22639 |
0.76 |
| 2026-05-28 12:00 |
04:52:24.95 |
+34:26:13.7 |
HIP 22639 |
2.29 |
| 2026-05-29 00:00 |
04:52:32.95 |
+34:26:18.5 |
HIP 22639 |
3.92 |
| 2026-05-29 12:00 |
04:52:40.96 |
+34:26:23.4 |
HIP 22639 |
5.56 |
| 2026-05-30 00:00 |
04:52:48.97 |
+34:26:28.4 |
HIP 22639 |
7.21 |
| 2026-05-30 12:00 |
04:52:56.98 |
+34:26:33.6 |
HIP 22639 |
8.86 |
| 2026-05-31 00:00 |
04:53:05.00 |
+34:26:38.8 |
HIP 22639 |
10.52 |
| 2026-05-31 12:00 |
04:53:13.03 |
+34:26:44.2 |
HIP 22639 |
12.17 |
| 2026-06-01 00:00 |
04:53:21.06 |
+34:26:49.8 |
HIP 22639 |
13.83 |
| 2026-06-01 12:00 |
04:53:29.09 |
+34:26:55.4 |
HIP 22639 |
15.48 |
| 2026-06-02 00:00 |
04:53:37.13 |
+34:27:01.1 |
HIP 22718 |
16.53 |