92P/Sanguin
| Parameter |
Value |
| Designation |
92P/Sanguin |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-03-01T04:24:17.484480Z |
| Orbit solution date (soln_date, UTC) |
2015-12-09T11:26:49Z |
| Obs used |
919 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
17.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-12-19.0000000 |
| e |
0.65932548 |
| q (au) |
1.825456 |
| a (au) |
5.358357 |
| i (deg) |
19.444606 |
| Ω (om, deg) |
181.458916 |
| ω (w, deg) |
163.789034 |
| M (ma, deg) |
23.267628 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.783 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.783 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.590 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2014-04-30 |
2014-08-21 |
+1.5336 |
-0.375 |
| 2015-09-19 |
2016-01-13 |
+4.8411 |
-2.744 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
15:35:25.91 |
-06:24:04.6 |
HIP 76400 |
11.69 |
| 2026-02-03 12:00 |
15:35:42.08 |
-06:23:10.9 |
HIP 76400 |
7.65 |
| 2026-02-04 00:00 |
15:35:58.12 |
-06:22:16.0 |
HIP 76400 |
3.80 |
| 2026-02-04 12:00 |
15:36:14.01 |
-06:21:20.0 |
HIP 76400 |
1.97 |
| 2026-02-05 00:00 |
15:36:29.76 |
-06:20:22.8 |
HIP 76400 |
5.10 |
| 2026-02-05 12:00 |
15:36:45.37 |
-06:19:24.5 |
HIP 76400 |
8.96 |
| 2026-02-06 00:00 |
15:37:00.84 |
-06:18:25.0 |
HIP 76400 |
12.87 |
| 2026-02-06 12:00 |
15:37:16.16 |
-06:17:24.3 |
HIP 76400 |
16.79 |
| 2026-02-07 00:00 |
15:37:31.33 |
-06:16:22.5 |
HIP 76571 |
14.06 |
| 2026-02-07 12:00 |
15:37:46.36 |
-06:15:19.5 |
HIP 76571 |
10.54 |
| 2026-02-08 00:00 |
15:38:01.24 |
-06:14:15.3 |
HIP 76571 |
7.40 |
| 2026-02-08 12:00 |
15:38:15.97 |
-06:13:09.9 |
HIP 76571 |
5.28 |
| 2026-02-09 00:00 |
15:38:30.54 |
-06:12:03.4 |
HIP 76571 |
5.45 |
| 2026-02-09 12:00 |
15:38:44.97 |
-06:10:55.7 |
HIP 76571 |
7.72 |
| 2026-02-10 00:00 |
15:38:59.24 |
-06:09:46.8 |
HIP 76638 |
8.43 |
| 2026-02-10 12:00 |
15:39:13.35 |
-06:08:36.7 |
HIP 76638 |
7.76 |
| 2026-02-11 00:00 |
15:39:27.31 |
-06:07:25.4 |
HIP 76638 |
8.72 |
| 2026-02-11 12:00 |
15:39:41.11 |
-06:06:13.0 |
HIP 76638 |
10.86 |
| 2026-02-12 00:00 |
15:39:54.75 |
-06:04:59.4 |
HIP 76638 |
13.60 |
| 2026-02-12 12:00 |
15:40:08.23 |
-06:03:44.6 |
HIP 76638 |
16.63 |
| 2026-02-13 00:00 |
15:40:21.55 |
-06:02:28.6 |
HIP 76638 |
19.80 |
| 2026-02-13 12:00 |
15:40:34.71 |
-06:01:11.4 |
HIP 76638 |
23.05 |
| 2026-02-14 00:00 |
15:40:47.70 |
-05:59:53.0 |
HIP 76798 |
21.92 |
| 2026-02-14 12:00 |
15:41:00.53 |
-05:58:33.5 |
HIP 76798 |
20.73 |
| 2026-02-15 00:00 |
15:41:13.18 |
-05:57:12.7 |
HIP 76798 |
20.05 |
| 2026-02-15 12:00 |
15:41:25.67 |
-05:55:50.8 |
HIP 76798 |
19.90 |
| 2026-02-16 00:00 |
15:41:37.99 |
-05:54:27.7 |
HIP 76798 |
20.28 |
| 2026-02-16 12:00 |
15:41:50.14 |
-05:53:03.3 |
HIP 76798 |
21.16 |
| 2026-02-17 00:00 |
15:42:02.12 |
-05:51:37.8 |
HIP 76798 |
22.45 |
| 2026-02-17 12:00 |
15:42:13.92 |
-05:50:11.2 |
HIP 77030 |
23.05 |
| 2026-02-18 00:00 |
15:42:25.55 |
-05:48:43.3 |
HIP 77030 |
19.83 |
| 2026-02-18 12:00 |
15:42:37.01 |
-05:47:14.2 |
HIP 77030 |
16.65 |
| 2026-02-19 00:00 |
15:42:48.28 |
-05:45:44.0 |
HIP 77030 |
13.53 |
| 2026-02-19 12:00 |
15:42:59.38 |
-05:44:12.6 |
HIP 77030 |
10.47 |
| 2026-02-20 00:00 |
15:43:10.30 |
-05:42:40.0 |
HIP 77030 |
7.55 |
| 2026-02-20 12:00 |
15:43:21.04 |
-05:41:06.2 |
HIP 77030 |
4.92 |
| 2026-02-21 00:00 |
15:43:31.60 |
-05:39:31.3 |
HIP 77030 |
3.30 |
| 2026-02-21 12:00 |
15:43:41.97 |
-05:37:55.1 |
HIP 77030 |
4.06 |
| 2026-02-22 00:00 |
15:43:52.16 |
-05:36:17.8 |
HIP 77030 |
6.36 |
| 2026-02-22 12:00 |
15:44:02.17 |
-05:34:39.4 |
HIP 77030 |
9.08 |
| 2026-02-23 00:00 |
15:44:11.99 |
-05:32:59.7 |
HIP 77030 |
11.91 |
| 2026-02-23 12:00 |
15:44:21.62 |
-05:31:18.9 |
HIP 77030 |
14.76 |
| 2026-02-24 00:00 |
15:44:31.07 |
-05:29:37.0 |
HIP 77030 |
17.63 |