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) |
| 2026-07-29 00:00 |
09:12:20.09 |
+43:44:59.4 |
HIP 45281 |
15.78 |
| 2026-07-29 12:00 |
09:12:23.74 |
+43:44:45.3 |
HIP 45281 |
15.22 |
| 2026-07-30 00:00 |
09:12:27.40 |
+43:44:31.4 |
HIP 45281 |
14.68 |
| 2026-07-30 12:00 |
09:12:31.06 |
+43:44:17.6 |
HIP 45281 |
14.15 |
| 2026-07-31 00:00 |
09:12:34.73 |
+43:44:04.0 |
HIP 45281 |
13.63 |
| 2026-07-31 12:00 |
09:12:38.40 |
+43:43:50.5 |
HIP 45281 |
13.13 |
| 2026-08-01 00:00 |
09:12:42.07 |
+43:43:37.2 |
HIP 45281 |
12.64 |
| 2026-08-01 12:00 |
09:12:45.75 |
+43:43:24.0 |
HIP 45281 |
12.18 |
| 2026-08-02 00:00 |
09:12:49.43 |
+43:43:11.0 |
HIP 45281 |
11.73 |
| 2026-08-02 12:00 |
09:12:53.11 |
+43:42:58.1 |
HIP 45281 |
11.31 |
| 2026-08-03 00:00 |
09:12:56.80 |
+43:42:45.4 |
HIP 45281 |
10.91 |
| 2026-08-03 12:00 |
09:13:00.49 |
+43:42:32.8 |
HIP 45281 |
10.55 |
| 2026-08-04 00:00 |
09:13:04.18 |
+43:42:20.4 |
HIP 45281 |
10.21 |
| 2026-08-04 12:00 |
09:13:07.87 |
+43:42:08.1 |
HIP 45281 |
9.92 |
| 2026-08-05 00:00 |
09:13:11.56 |
+43:41:56.0 |
HIP 45281 |
9.66 |
| 2026-08-05 12:00 |
09:13:15.26 |
+43:41:44.0 |
HIP 45281 |
9.44 |
| 2026-08-06 00:00 |
09:13:18.96 |
+43:41:32.2 |
HIP 45281 |
9.27 |
| 2026-08-06 12:00 |
09:13:22.66 |
+43:41:20.5 |
HIP 45281 |
9.14 |
| 2026-08-07 00:00 |
09:13:26.36 |
+43:41:09.0 |
HIP 45281 |
9.07 |
| 2026-08-07 12:00 |
09:13:30.06 |
+43:40:57.7 |
HIP 45281 |
9.04 |
| 2026-08-08 00:00 |
09:13:33.76 |
+43:40:46.5 |
HIP 45281 |
9.07 |
| 2026-08-08 12:00 |
09:13:37.46 |
+43:40:35.5 |
HIP 45281 |
9.15 |
| 2026-08-09 00:00 |
09:13:41.16 |
+43:40:24.7 |
HIP 45281 |
9.27 |
| 2026-08-09 12:00 |
09:13:44.86 |
+43:40:14.0 |
HIP 45281 |
9.44 |
| 2026-08-10 00:00 |
09:13:48.56 |
+43:40:03.5 |
HIP 45281 |
9.66 |
| 2026-08-10 12:00 |
09:13:52.26 |
+43:39:53.1 |
HIP 45281 |
9.91 |
| 2026-08-11 00:00 |
09:13:55.96 |
+43:39:42.9 |
HIP 45281 |
10.20 |
| 2026-08-11 12:00 |
09:13:59.65 |
+43:39:32.9 |
HIP 45281 |
10.53 |
| 2026-08-12 00:00 |
09:14:03.35 |
+43:39:23.1 |
HIP 45281 |
10.89 |
| 2026-08-12 12:00 |
09:14:07.04 |
+43:39:13.4 |
HIP 45281 |
11.28 |
| 2026-08-13 00:00 |
09:14:10.73 |
+43:39:03.9 |
HIP 45281 |
11.69 |
| 2026-08-13 12:00 |
09:14:14.41 |
+43:38:54.5 |
HIP 45281 |
12.12 |
| 2026-08-14 00:00 |
09:14:18.10 |
+43:38:45.3 |
HIP 45281 |
12.57 |
| 2026-08-14 12:00 |
09:14:21.78 |
+43:38:36.3 |
HIP 45281 |
13.04 |
| 2026-08-15 00:00 |
09:14:25.46 |
+43:38:27.5 |
HIP 45281 |
13.53 |
| 2026-08-15 12:00 |
09:14:29.13 |
+43:38:18.9 |
HIP 45281 |
14.03 |
| 2026-08-16 00:00 |
09:14:32.80 |
+43:38:10.4 |
HIP 45281 |
14.54 |
| 2026-08-16 12:00 |
09:14:36.47 |
+43:38:02.1 |
HIP 45281 |
15.06 |
| 2026-08-17 00:00 |
09:14:40.13 |
+43:37:53.9 |
HIP 45281 |
15.59 |
| 2026-08-17 12:00 |
09:14:43.79 |
+43:37:46.0 |
HIP 45281 |
16.13 |
| 2026-08-18 00:00 |
09:14:47.44 |
+43:37:38.2 |
HIP 45281 |
16.67 |
| 2026-08-18 12:00 |
09:14:51.09 |
+43:37:30.6 |
HIP 45281 |
17.23 |
| 2026-08-19 00:00 |
09:14:54.73 |
+43:37:23.2 |
HIP 45281 |
17.78 |