메타데이터
| 항목 |
값 |
| Designation |
C/2001 W1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-12-24T21:37:29.415360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:11Z |
| Obs used |
101 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2001-12-04.0000000 |
| e |
0.99892724 |
| q (au) |
2.399249 |
| a (au) |
2236.511889 |
| i (deg) |
118.645272 |
| Ω (om, deg) |
91.939782 |
| ω (w, deg) |
6.161504 |
| M (ma, deg) |
359.999805 |
밝기
산란 + 전체 선형
$$
M_a = (14.635 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.635 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
18:43:53.39 |
-04:53:28.3 |
HIP 92028 |
29.48 |
| 2026-07-29 12:00 |
18:43:50.96 |
-04:53:38.1 |
HIP 92028 |
30.06 |
| 2026-07-30 00:00 |
18:43:48.55 |
-04:53:47.9 |
HIP 92028 |
30.64 |
| 2026-07-30 12:00 |
18:43:46.15 |
-04:53:57.9 |
HIP 92028 |
31.23 |
| 2026-07-31 00:00 |
18:43:43.77 |
-04:54:07.9 |
HIP 92028 |
31.81 |
| 2026-07-31 12:00 |
18:43:41.39 |
-04:54:18.0 |
HIP 91738 |
32.07 |
| 2026-08-01 00:00 |
18:43:39.02 |
-04:54:28.1 |
HIP 91738 |
31.59 |
| 2026-08-01 12:00 |
18:43:36.66 |
-04:54:38.4 |
HIP 91738 |
31.12 |
| 2026-08-02 00:00 |
18:43:34.32 |
-04:54:48.7 |
HIP 91738 |
30.66 |
| 2026-08-02 12:00 |
18:43:31.98 |
-04:54:59.1 |
HIP 91738 |
30.20 |
| 2026-08-03 00:00 |
18:43:29.66 |
-04:55:09.6 |
HIP 91738 |
29.74 |
| 2026-08-03 12:00 |
18:43:27.35 |
-04:55:20.1 |
HIP 91738 |
29.29 |
| 2026-08-04 00:00 |
18:43:25.05 |
-04:55:30.8 |
HIP 91738 |
28.85 |
| 2026-08-04 12:00 |
18:43:22.77 |
-04:55:41.5 |
HIP 91738 |
28.41 |
| 2026-08-05 00:00 |
18:43:20.49 |
-04:55:52.2 |
HIP 91738 |
27.98 |
| 2026-08-05 12:00 |
18:43:18.23 |
-04:56:03.1 |
HIP 91738 |
27.55 |
| 2026-08-06 00:00 |
18:43:15.98 |
-04:56:14.0 |
HIP 91738 |
27.14 |
| 2026-08-06 12:00 |
18:43:13.74 |
-04:56:25.0 |
HIP 91738 |
26.72 |
| 2026-08-07 00:00 |
18:43:11.52 |
-04:56:36.0 |
HIP 91738 |
26.32 |
| 2026-08-07 12:00 |
18:43:09.31 |
-04:56:47.2 |
HIP 91738 |
25.92 |
| 2026-08-08 00:00 |
18:43:07.11 |
-04:56:58.4 |
HIP 91738 |
25.53 |
| 2026-08-08 12:00 |
18:43:04.93 |
-04:57:09.6 |
HIP 91738 |
25.15 |
| 2026-08-09 00:00 |
18:43:02.76 |
-04:57:21.0 |
HIP 91738 |
24.77 |
| 2026-08-09 12:00 |
18:43:00.60 |
-04:57:32.4 |
HIP 91738 |
24.41 |
| 2026-08-10 00:00 |
18:42:58.46 |
-04:57:43.8 |
HIP 91738 |
24.05 |
| 2026-08-10 12:00 |
18:42:56.33 |
-04:57:55.4 |
HIP 91738 |
23.70 |
| 2026-08-11 00:00 |
18:42:54.22 |
-04:58:07.0 |
HIP 91738 |
23.35 |
| 2026-08-11 12:00 |
18:42:52.12 |
-04:58:18.6 |
HIP 91738 |
23.02 |
| 2026-08-12 00:00 |
18:42:50.03 |
-04:58:30.3 |
HIP 91738 |
22.69 |
| 2026-08-12 12:00 |
18:42:47.96 |
-04:58:42.1 |
HIP 91738 |
22.38 |
| 2026-08-13 00:00 |
18:42:45.90 |
-04:58:54.0 |
HIP 91738 |
22.07 |
| 2026-08-13 12:00 |
18:42:43.86 |
-04:59:05.9 |
HIP 91738 |
21.77 |
| 2026-08-14 00:00 |
18:42:41.84 |
-04:59:17.9 |
HIP 91738 |
21.48 |
| 2026-08-14 12:00 |
18:42:39.83 |
-04:59:29.9 |
HIP 91738 |
21.20 |
| 2026-08-15 00:00 |
18:42:37.84 |
-04:59:42.0 |
HIP 91738 |
20.93 |
| 2026-08-15 12:00 |
18:42:35.86 |
-04:59:54.1 |
HIP 91738 |
20.67 |
| 2026-08-16 00:00 |
18:42:33.90 |
-05:00:06.3 |
HIP 91738 |
20.42 |
| 2026-08-16 12:00 |
18:42:31.95 |
-05:00:18.6 |
HIP 91738 |
20.18 |
| 2026-08-17 00:00 |
18:42:30.02 |
-05:00:30.9 |
HIP 91738 |
19.95 |
| 2026-08-17 12:00 |
18:42:28.10 |
-05:00:43.3 |
HIP 91738 |
19.73 |
| 2026-08-18 00:00 |
18:42:26.21 |
-05:00:55.7 |
HIP 91738 |
19.52 |
| 2026-08-18 12:00 |
18:42:24.33 |
-05:01:08.2 |
HIP 91738 |
19.32 |
| 2026-08-19 00:00 |
18:42:22.46 |
-05:01:20.7 |
HIP 91738 |
19.14 |