167P/CINEOS
| 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) |
| 2026-02-03 00:00 |
04:36:35.75 |
+35:12:23.2 |
HIP 21491 |
15.84 |
| 2026-02-03 12:00 |
04:36:33.79 |
+35:11:56.8 |
HIP 21491 |
15.54 |
| 2026-02-04 00:00 |
04:36:31.88 |
+35:11:30.5 |
HIP 21491 |
15.24 |
| 2026-02-04 12:00 |
04:36:30.04 |
+35:11:04.2 |
HIP 21491 |
14.96 |
| 2026-02-05 00:00 |
04:36:28.26 |
+35:10:37.9 |
HIP 21491 |
14.69 |
| 2026-02-05 12:00 |
04:36:26.54 |
+35:10:11.7 |
HIP 21491 |
14.44 |
| 2026-02-06 00:00 |
04:36:24.88 |
+35:09:45.6 |
HIP 21491 |
14.19 |
| 2026-02-06 12:00 |
04:36:23.28 |
+35:09:19.5 |
HIP 21491 |
13.96 |
| 2026-02-07 00:00 |
04:36:21.74 |
+35:08:53.4 |
HIP 21491 |
13.75 |
| 2026-02-07 12:00 |
04:36:20.26 |
+35:08:27.4 |
HIP 21491 |
13.54 |
| 2026-02-08 00:00 |
04:36:18.85 |
+35:08:01.4 |
HIP 21491 |
13.34 |
| 2026-02-08 12:00 |
04:36:17.50 |
+35:07:35.5 |
HIP 21491 |
13.16 |
| 2026-02-09 00:00 |
04:36:16.20 |
+35:07:09.6 |
HIP 21491 |
12.98 |
| 2026-02-09 12:00 |
04:36:14.97 |
+35:06:43.8 |
HIP 21491 |
12.82 |
| 2026-02-10 00:00 |
04:36:13.81 |
+35:06:18.1 |
HIP 21491 |
12.66 |
| 2026-02-10 12:00 |
04:36:12.70 |
+35:05:52.4 |
HIP 21491 |
12.52 |
| 2026-02-11 00:00 |
04:36:11.66 |
+35:05:26.8 |
HIP 21491 |
12.38 |
| 2026-02-11 12:00 |
04:36:10.68 |
+35:05:01.3 |
HIP 21491 |
12.25 |
| 2026-02-12 00:00 |
04:36:09.76 |
+35:04:35.8 |
HIP 21491 |
12.13 |
| 2026-02-12 12:00 |
04:36:08.90 |
+35:04:10.4 |
HIP 21491 |
12.02 |
| 2026-02-13 00:00 |
04:36:08.11 |
+35:03:45.1 |
HIP 21491 |
11.91 |
| 2026-02-13 12:00 |
04:36:07.38 |
+35:03:19.9 |
HIP 21491 |
11.80 |
| 2026-02-14 00:00 |
04:36:06.71 |
+35:02:54.7 |
HIP 21491 |
11.71 |
| 2026-02-14 12:00 |
04:36:06.11 |
+35:02:29.6 |
HIP 21491 |
11.62 |
| 2026-02-15 00:00 |
04:36:05.57 |
+35:02:04.6 |
HIP 21491 |
11.53 |
| 2026-02-15 12:00 |
04:36:05.09 |
+35:01:39.7 |
HIP 21491 |
11.45 |
| 2026-02-16 00:00 |
04:36:04.67 |
+35:01:14.8 |
HIP 21491 |
11.37 |
| 2026-02-16 12:00 |
04:36:04.32 |
+35:00:50.1 |
HIP 21491 |
11.29 |
| 2026-02-17 00:00 |
04:36:04.03 |
+35:00:25.4 |
HIP 21491 |
11.22 |
| 2026-02-17 12:00 |
04:36:03.81 |
+35:00:00.8 |
HIP 21491 |
11.15 |
| 2026-02-18 00:00 |
04:36:03.65 |
+34:59:36.3 |
HIP 21491 |
11.09 |
| 2026-02-18 12:00 |
04:36:03.55 |
+34:59:12.0 |
HIP 21491 |
11.02 |
| 2026-02-19 00:00 |
04:36:03.51 |
+34:58:47.7 |
HIP 21491 |
10.96 |
| 2026-02-19 12:00 |
04:36:03.54 |
+34:58:23.5 |
HIP 21491 |
10.90 |
| 2026-02-20 00:00 |
04:36:03.64 |
+34:57:59.4 |
HIP 21491 |
10.84 |
| 2026-02-20 12:00 |
04:36:03.79 |
+34:57:35.4 |
HIP 21491 |
10.79 |
| 2026-02-21 00:00 |
04:36:04.01 |
+34:57:11.5 |
HIP 21491 |
10.73 |
| 2026-02-21 12:00 |
04:36:04.29 |
+34:56:47.7 |
HIP 21491 |
10.68 |
| 2026-02-22 00:00 |
04:36:04.64 |
+34:56:24.0 |
HIP 21491 |
10.63 |
| 2026-02-22 12:00 |
04:36:05.05 |
+34:56:00.4 |
HIP 21491 |
10.58 |
| 2026-02-23 00:00 |
04:36:05.52 |
+34:55:36.9 |
HIP 21491 |
10.53 |
| 2026-02-23 12:00 |
04:36:06.05 |
+34:55:13.6 |
HIP 21491 |
10.49 |
| 2026-02-24 00:00 |
04:36:06.65 |
+34:54:50.3 |
HIP 21491 |
10.44 |