메타데이터
| 항목 |
값 |
| Designation |
C/2017 E5 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-06-10T21:21:43.948800Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:32Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
15.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-01-12.0000000 |
| e |
0.99563963 |
| q (au) |
1.783311 |
| a (au) |
408.982042 |
| i (deg) |
122.637072 |
| Ω (om, deg) |
206.191666 |
| ω (w, deg) |
306.771175 |
| M (ma, deg) |
0.025634 |
밝기
산란 + 전체 선형
$$
M_a = (17.408 + 3.382\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.408 |
| n |
3.382 |
| gf |
1.000 |
| gb |
-0.863 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
08:17:14.54 |
+77:38:41.9 |
HIP 40055 |
20.20 |
| 2026-05-12 12:00 |
08:17:19.92 |
+77:37:42.7 |
HIP 40055 |
20.51 |
| 2026-05-13 00:00 |
08:17:25.45 |
+77:36:43.6 |
HIP 40055 |
20.89 |
| 2026-05-13 12:00 |
08:17:31.15 |
+77:35:44.6 |
HIP 40055 |
21.31 |
| 2026-05-14 00:00 |
08:17:37.00 |
+77:34:45.8 |
HIP 40055 |
21.78 |
| 2026-05-14 12:00 |
08:17:43.01 |
+77:33:47.1 |
HIP 40055 |
22.30 |
| 2026-05-15 00:00 |
08:17:49.17 |
+77:32:48.6 |
HIP 40055 |
22.86 |
| 2026-05-15 12:00 |
08:17:55.48 |
+77:31:50.2 |
HIP 40055 |
23.47 |
| 2026-05-16 00:00 |
08:18:01.94 |
+77:30:51.9 |
HIP 40055 |
24.10 |
| 2026-05-16 12:00 |
08:18:08.56 |
+77:29:53.8 |
HIP 40055 |
24.78 |
| 2026-05-17 00:00 |
08:18:15.32 |
+77:28:55.9 |
HIP 40055 |
25.48 |
| 2026-05-17 12:00 |
08:18:22.24 |
+77:27:58.1 |
HIP 40055 |
26.21 |
| 2026-05-18 00:00 |
08:18:29.30 |
+77:27:00.5 |
HIP 40055 |
26.97 |
| 2026-05-18 12:00 |
08:18:36.50 |
+77:26:03.0 |
HIP 40055 |
27.76 |
| 2026-05-19 00:00 |
08:18:43.85 |
+77:25:05.7 |
HIP 40055 |
28.56 |
| 2026-05-19 12:00 |
08:18:51.34 |
+77:24:08.5 |
HIP 40055 |
29.39 |
| 2026-05-20 00:00 |
08:18:58.97 |
+77:23:11.6 |
HIP 40055 |
30.23 |
| 2026-05-20 12:00 |
08:19:06.74 |
+77:22:14.8 |
HIP 41239 |
31.04 |
| 2026-05-21 00:00 |
08:19:14.65 |
+77:21:18.2 |
HIP 41239 |
30.03 |
| 2026-05-21 12:00 |
08:19:22.70 |
+77:20:21.7 |
HIP 41239 |
29.03 |
| 2026-05-22 00:00 |
08:19:30.88 |
+77:19:25.5 |
HIP 41239 |
28.02 |
| 2026-05-22 12:00 |
08:19:39.20 |
+77:18:29.5 |
HIP 41239 |
27.01 |
| 2026-05-23 00:00 |
08:19:47.65 |
+77:17:33.6 |
HIP 41239 |
26.01 |
| 2026-05-23 12:00 |
08:19:56.23 |
+77:16:37.9 |
HIP 41239 |
25.00 |
| 2026-05-24 00:00 |
08:20:04.95 |
+77:15:42.5 |
HIP 41239 |
23.99 |
| 2026-05-24 12:00 |
08:20:13.79 |
+77:14:47.2 |
HIP 41239 |
22.99 |
| 2026-05-25 00:00 |
08:20:22.76 |
+77:13:52.1 |
HIP 41239 |
21.98 |
| 2026-05-25 12:00 |
08:20:31.85 |
+77:12:57.2 |
HIP 41239 |
20.98 |
| 2026-05-26 00:00 |
08:20:41.08 |
+77:12:02.6 |
HIP 41239 |
19.97 |
| 2026-05-26 12:00 |
08:20:50.42 |
+77:11:08.1 |
HIP 41239 |
18.97 |
| 2026-05-27 00:00 |
08:20:59.89 |
+77:10:13.9 |
HIP 41239 |
17.96 |
| 2026-05-27 12:00 |
08:21:09.49 |
+77:09:19.9 |
HIP 41239 |
16.96 |
| 2026-05-28 00:00 |
08:21:19.20 |
+77:08:26.1 |
HIP 41239 |
15.96 |
| 2026-05-28 12:00 |
08:21:29.03 |
+77:07:32.5 |
HIP 41239 |
14.97 |
| 2026-05-29 00:00 |
08:21:38.98 |
+77:06:39.1 |
HIP 41239 |
13.98 |
| 2026-05-29 12:00 |
08:21:49.05 |
+77:05:46.0 |
HIP 41239 |
12.99 |
| 2026-05-30 00:00 |
08:21:59.23 |
+77:04:53.1 |
HIP 41239 |
12.01 |
| 2026-05-30 12:00 |
08:22:09.53 |
+77:04:00.4 |
HIP 41239 |
11.04 |
| 2026-05-31 00:00 |
08:22:19.95 |
+77:03:07.9 |
HIP 41239 |
10.08 |
| 2026-05-31 12:00 |
08:22:30.47 |
+77:02:15.7 |
HIP 41239 |
9.14 |
| 2026-06-01 00:00 |
08:22:41.11 |
+77:01:23.7 |
HIP 41239 |
8.22 |
| 2026-06-01 12:00 |
08:22:51.86 |
+77:00:32.0 |
HIP 41239 |
7.32 |
| 2026-06-02 00:00 |
08:23:02.72 |
+76:59:40.5 |
HIP 41239 |
6.47 |