메타데이터
| 항목 |
값 |
| Designation |
C/2006 WD4 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-04-28T09:33:26.683200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:02Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
17.200 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-01-20.0000000 |
| e |
0.99898724 |
| q (au) |
0.591244 |
| a (au) |
583.797842 |
| i (deg) |
152.704616 |
| Ω (om, deg) |
226.790541 |
| ω (w, deg) |
292.690897 |
| M (ma, deg) |
359.993125 |
밝기
산란 + 전체 선형
$$
M_a = (13.923 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.923 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
09:06:09.13 |
+44:38:48.8 |
HIP 44606 |
12.65 |
| 2026-05-12 12:00 |
09:06:09.48 |
+44:38:27.0 |
HIP 44606 |
12.44 |
| 2026-05-13 00:00 |
09:06:09.87 |
+44:38:05.1 |
HIP 44606 |
12.24 |
| 2026-05-13 12:00 |
09:06:10.29 |
+44:37:43.2 |
HIP 44606 |
12.06 |
| 2026-05-14 00:00 |
09:06:10.74 |
+44:37:21.2 |
HIP 44606 |
11.89 |
| 2026-05-14 12:00 |
09:06:11.22 |
+44:36:59.1 |
HIP 44606 |
11.74 |
| 2026-05-15 00:00 |
09:06:11.74 |
+44:36:37.0 |
HIP 44606 |
11.59 |
| 2026-05-15 12:00 |
09:06:12.29 |
+44:36:14.8 |
HIP 44606 |
11.47 |
| 2026-05-16 00:00 |
09:06:12.88 |
+44:35:52.6 |
HIP 44606 |
11.36 |
| 2026-05-16 12:00 |
09:06:13.49 |
+44:35:30.3 |
HIP 44606 |
11.26 |
| 2026-05-17 00:00 |
09:06:14.14 |
+44:35:08.0 |
HIP 44606 |
11.19 |
| 2026-05-17 12:00 |
09:06:14.83 |
+44:34:45.6 |
HIP 44606 |
11.13 |
| 2026-05-18 00:00 |
09:06:15.54 |
+44:34:23.2 |
HIP 44606 |
11.09 |
| 2026-05-18 12:00 |
09:06:16.29 |
+44:34:00.7 |
HIP 44606 |
11.07 |
| 2026-05-19 00:00 |
09:06:17.07 |
+44:33:38.2 |
HIP 44606 |
11.07 |
| 2026-05-19 12:00 |
09:06:17.89 |
+44:33:15.7 |
HIP 44606 |
11.09 |
| 2026-05-20 00:00 |
09:06:18.73 |
+44:32:53.1 |
HIP 44606 |
11.13 |
| 2026-05-20 12:00 |
09:06:19.61 |
+44:32:30.5 |
HIP 44606 |
11.19 |
| 2026-05-21 00:00 |
09:06:20.52 |
+44:32:07.8 |
HIP 44606 |
11.27 |
| 2026-05-21 12:00 |
09:06:21.47 |
+44:31:45.1 |
HIP 44606 |
11.36 |
| 2026-05-22 00:00 |
09:06:22.44 |
+44:31:22.3 |
HIP 44606 |
11.48 |
| 2026-05-22 12:00 |
09:06:23.45 |
+44:30:59.6 |
HIP 44606 |
11.62 |
| 2026-05-23 00:00 |
09:06:24.48 |
+44:30:36.8 |
HIP 44606 |
11.78 |
| 2026-05-23 12:00 |
09:06:25.55 |
+44:30:13.9 |
HIP 44606 |
11.95 |
| 2026-05-24 00:00 |
09:06:26.65 |
+44:29:51.1 |
HIP 44606 |
12.15 |
| 2026-05-24 12:00 |
09:06:27.78 |
+44:29:28.2 |
HIP 44606 |
12.36 |
| 2026-05-25 00:00 |
09:06:28.94 |
+44:29:05.3 |
HIP 44606 |
12.59 |
| 2026-05-25 12:00 |
09:06:30.13 |
+44:28:42.4 |
HIP 44606 |
12.83 |
| 2026-05-26 00:00 |
09:06:31.36 |
+44:28:19.4 |
HIP 44606 |
13.09 |
| 2026-05-26 12:00 |
09:06:32.61 |
+44:27:56.5 |
HIP 44606 |
13.36 |
| 2026-05-27 00:00 |
09:06:33.89 |
+44:27:33.5 |
HIP 44606 |
13.65 |
| 2026-05-27 12:00 |
09:06:35.21 |
+44:27:10.5 |
HIP 44606 |
13.96 |
| 2026-05-28 00:00 |
09:06:36.55 |
+44:26:47.5 |
HIP 44606 |
14.27 |
| 2026-05-28 12:00 |
09:06:37.93 |
+44:26:24.5 |
HIP 44606 |
14.60 |
| 2026-05-29 00:00 |
09:06:39.33 |
+44:26:01.4 |
HIP 44606 |
14.94 |
| 2026-05-29 12:00 |
09:06:40.76 |
+44:25:38.4 |
HIP 44606 |
15.29 |
| 2026-05-30 00:00 |
09:06:42.23 |
+44:25:15.3 |
HIP 44606 |
15.65 |
| 2026-05-30 12:00 |
09:06:43.72 |
+44:24:52.3 |
HIP 44606 |
16.03 |
| 2026-05-31 00:00 |
09:06:45.24 |
+44:24:29.2 |
HIP 44606 |
16.41 |
| 2026-05-31 12:00 |
09:06:46.79 |
+44:24:06.1 |
HIP 44606 |
16.80 |
| 2026-06-01 00:00 |
09:06:48.37 |
+44:23:43.0 |
HIP 44606 |
17.20 |
| 2026-06-01 12:00 |
09:06:49.98 |
+44:23:20.0 |
HIP 44606 |
17.61 |
| 2026-06-02 00:00 |
09:06:51.61 |
+44:22:56.9 |
HIP 44606 |
18.03 |