| Parameter |
Value |
| Designation |
471P/LINEAR-Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-12-20T07:38:00.384000Z |
| Orbit solution date (soln_date, UTC) |
2025-02-28T13:42:36Z |
| Obs used |
911 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
16.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2010-12-31T07:04:42.816000Z |
| Discovery magnitude (MPC) |
19.40 |
| Discovery observatory (MPC) |
704 · Lincoln Laboratory ETS, New Mexico |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-07-24.0000000 |
| e |
0.62777839 |
| q (au) |
2.123265 |
| a (au) |
5.704303 |
| i (deg) |
4.790901 |
| Ω (om, deg) |
283.347061 |
| ω (w, deg) |
94.964365 |
| M (ma, deg) |
349.197793 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.726 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.726 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.893 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2023-05-24 |
2023-07-28 |
+10.4044 |
-3.520 |
| 2023-07-28 |
2023-12-18 |
+2.8020 |
-0.914 |
| 2023-12-22 |
2025-02-27 |
-10.3387 |
+2.991 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
09:40:59.67 |
+09:53:15.6 |
HIP 47508 |
2.34 |
| 2026-05-12 12:00 |
09:41:04.88 |
+09:53:03.1 |
HIP 47508 |
1.15 |
| 2026-05-13 00:00 |
09:41:10.22 |
+09:52:49.8 |
HIP 47508 |
0.76 |
| 2026-05-13 12:00 |
09:41:15.70 |
+09:52:35.8 |
HIP 47508 |
1.88 |
| 2026-05-14 00:00 |
09:41:21.32 |
+09:52:21.0 |
HIP 47508 |
3.23 |
| 2026-05-14 12:00 |
09:41:27.08 |
+09:52:05.5 |
HIP 47508 |
4.66 |
| 2026-05-15 00:00 |
09:41:32.97 |
+09:51:49.2 |
HIP 47508 |
6.12 |
| 2026-05-15 12:00 |
09:41:39.00 |
+09:51:32.2 |
HIP 47508 |
7.63 |
| 2026-05-16 00:00 |
09:41:45.16 |
+09:51:14.5 |
HIP 47508 |
9.17 |
| 2026-05-16 12:00 |
09:41:51.45 |
+09:50:56.0 |
HIP 47508 |
10.75 |
| 2026-05-17 00:00 |
09:41:57.88 |
+09:50:36.7 |
HIP 47508 |
12.36 |
| 2026-05-17 12:00 |
09:42:04.44 |
+09:50:16.7 |
HIP 47508 |
14.01 |
| 2026-05-18 00:00 |
09:42:11.13 |
+09:49:56.0 |
HIP 47508 |
15.70 |
| 2026-05-18 12:00 |
09:42:17.96 |
+09:49:34.6 |
HIP 47508 |
17.41 |
| 2026-05-19 00:00 |
09:42:24.91 |
+09:49:12.4 |
HIP 47508 |
19.17 |
| 2026-05-19 12:00 |
09:42:31.99 |
+09:48:49.5 |
HIP 47508 |
20.95 |
| 2026-05-20 00:00 |
09:42:39.21 |
+09:48:25.8 |
HIP 47710 |
20.13 |
| 2026-05-20 12:00 |
09:42:46.54 |
+09:48:01.5 |
HIP 47710 |
18.57 |
| 2026-05-21 00:00 |
09:42:54.01 |
+09:47:36.4 |
HIP 47710 |
17.04 |
| 2026-05-21 12:00 |
09:43:01.60 |
+09:47:10.6 |
HIP 47710 |
15.56 |
| 2026-05-22 00:00 |
09:43:09.32 |
+09:46:44.0 |
HIP 47710 |
14.16 |
| 2026-05-22 12:00 |
09:43:17.16 |
+09:46:16.8 |
HIP 47710 |
12.88 |
| 2026-05-23 00:00 |
09:43:25.12 |
+09:45:48.9 |
HIP 47710 |
11.78 |
| 2026-05-23 12:00 |
09:43:33.21 |
+09:45:20.2 |
HIP 47710 |
10.93 |
| 2026-05-24 00:00 |
09:43:41.42 |
+09:44:50.8 |
HIP 47710 |
10.41 |
| 2026-05-24 12:00 |
09:43:49.75 |
+09:44:20.8 |
HIP 47710 |
10.29 |
| 2026-05-25 00:00 |
09:43:58.19 |
+09:43:50.0 |
HIP 47710 |
10.60 |
| 2026-05-25 12:00 |
09:44:06.76 |
+09:43:18.6 |
HIP 47710 |
11.33 |
| 2026-05-26 00:00 |
09:44:15.45 |
+09:42:46.4 |
HIP 47710 |
12.41 |
| 2026-05-26 12:00 |
09:44:24.25 |
+09:42:13.6 |
HIP 47710 |
13.78 |
| 2026-05-27 00:00 |
09:44:33.17 |
+09:41:40.1 |
HIP 47710 |
15.38 |
| 2026-05-27 12:00 |
09:44:42.20 |
+09:41:05.9 |
HIP 47710 |
17.15 |
| 2026-05-28 00:00 |
09:44:51.35 |
+09:40:31.0 |
HIP 47710 |
19.05 |
| 2026-05-28 12:00 |
09:45:00.61 |
+09:39:55.4 |
HIP 47710 |
21.07 |
| 2026-05-29 00:00 |
09:45:09.99 |
+09:39:19.2 |
HIP 47710 |
23.18 |
| 2026-05-29 12:00 |
09:45:19.48 |
+09:38:42.3 |
HIP 47710 |
25.36 |
| 2026-05-30 00:00 |
09:45:29.07 |
+09:38:04.7 |
HIP 47710 |
27.61 |
| 2026-05-30 12:00 |
09:45:38.79 |
+09:37:26.4 |
HIP 47710 |
29.91 |
| 2026-05-31 00:00 |
09:45:48.61 |
+09:36:47.5 |
HIP 47710 |
32.27 |
| 2026-05-31 12:00 |
09:45:58.53 |
+09:36:08.0 |
HIP 47710 |
34.67 |
| 2026-06-01 00:00 |
09:46:08.57 |
+09:35:27.7 |
HIP 47710 |
37.12 |
| 2026-06-01 12:00 |
09:46:18.72 |
+09:34:46.9 |
HIP 48055 |
36.67 |
| 2026-06-02 00:00 |
09:46:28.97 |
+09:34:05.3 |
HIP 48055 |
35.84 |