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) |
| 2026-09-20 00:00 |
18:41:02.59 |
-05:15:50.4 |
HIP 91738 |
21.47 |
| 2026-09-20 12:00 |
18:41:02.02 |
-05:16:04.4 |
HIP 91738 |
21.56 |
| 2026-09-21 00:00 |
18:41:01.47 |
-05:16:18.4 |
HIP 91738 |
21.65 |
| 2026-09-21 12:00 |
18:41:00.95 |
-05:16:32.4 |
HIP 91738 |
21.73 |
| 2026-09-22 00:00 |
18:41:00.44 |
-05:16:46.5 |
HIP 91738 |
21.81 |
| 2026-09-22 12:00 |
18:40:59.96 |
-05:17:00.4 |
HIP 91738 |
21.89 |
| 2026-09-23 00:00 |
18:40:59.50 |
-05:17:14.4 |
HIP 91738 |
21.97 |
| 2026-09-23 12:00 |
18:40:59.07 |
-05:17:28.4 |
HIP 91738 |
22.05 |
| 2026-09-24 00:00 |
18:40:58.65 |
-05:17:42.4 |
HIP 91738 |
22.12 |
| 2026-09-24 12:00 |
18:40:58.26 |
-05:17:56.3 |
HIP 91738 |
22.19 |
| 2026-09-25 00:00 |
18:40:57.89 |
-05:18:10.2 |
HIP 91738 |
22.25 |
| 2026-09-25 12:00 |
18:40:57.55 |
-05:18:24.1 |
HIP 91738 |
22.32 |
| 2026-09-26 00:00 |
18:40:57.22 |
-05:18:38.0 |
HIP 91738 |
22.38 |
| 2026-09-26 12:00 |
18:40:56.92 |
-05:18:51.9 |
HIP 91738 |
22.43 |
| 2026-09-27 00:00 |
18:40:56.64 |
-05:19:05.8 |
HIP 91738 |
22.49 |
| 2026-09-27 12:00 |
18:40:56.38 |
-05:19:19.7 |
HIP 91738 |
22.54 |
| 2026-09-28 00:00 |
18:40:56.15 |
-05:19:33.5 |
HIP 91738 |
22.59 |
| 2026-09-28 12:00 |
18:40:55.93 |
-05:19:47.3 |
HIP 91738 |
22.63 |
| 2026-09-29 00:00 |
18:40:55.74 |
-05:20:01.1 |
HIP 91738 |
22.67 |
| 2026-09-29 12:00 |
18:40:55.58 |
-05:20:14.9 |
HIP 91738 |
22.71 |
| 2026-09-30 00:00 |
18:40:55.43 |
-05:20:28.6 |
HIP 91738 |
22.75 |
| 2026-09-30 12:00 |
18:40:55.31 |
-05:20:42.3 |
HIP 91738 |
22.78 |
| 2026-10-01 00:00 |
18:40:55.21 |
-05:20:56.0 |
HIP 91738 |
22.81 |
| 2026-10-01 12:00 |
18:40:55.13 |
-05:21:09.7 |
HIP 91738 |
22.83 |
| 2026-10-02 00:00 |
18:40:55.07 |
-05:21:23.4 |
HIP 91738 |
22.86 |
| 2026-10-02 12:00 |
18:40:55.04 |
-05:21:37.0 |
HIP 91738 |
22.88 |
| 2026-10-03 00:00 |
18:40:55.03 |
-05:21:50.6 |
HIP 91738 |
22.89 |
| 2026-10-03 12:00 |
18:40:55.04 |
-05:22:04.2 |
HIP 91738 |
22.90 |
| 2026-10-04 00:00 |
18:40:55.07 |
-05:22:17.7 |
HIP 91738 |
22.91 |
| 2026-10-04 12:00 |
18:40:55.13 |
-05:22:31.2 |
HIP 91738 |
22.92 |
| 2026-10-05 00:00 |
18:40:55.21 |
-05:22:44.7 |
HIP 91738 |
22.92 |
| 2026-10-05 12:00 |
18:40:55.31 |
-05:22:58.1 |
HIP 91738 |
22.92 |
| 2026-10-06 00:00 |
18:40:55.43 |
-05:23:11.6 |
HIP 91738 |
22.91 |
| 2026-10-06 12:00 |
18:40:55.58 |
-05:23:25.0 |
HIP 91738 |
22.90 |
| 2026-10-07 00:00 |
18:40:55.75 |
-05:23:38.3 |
HIP 91738 |
22.89 |
| 2026-10-07 12:00 |
18:40:55.94 |
-05:23:51.6 |
HIP 91738 |
22.88 |
| 2026-10-08 00:00 |
18:40:56.15 |
-05:24:04.9 |
HIP 91738 |
22.86 |
| 2026-10-08 12:00 |
18:40:56.39 |
-05:24:18.1 |
HIP 91738 |
22.84 |
| 2026-10-09 00:00 |
18:40:56.64 |
-05:24:31.3 |
HIP 91738 |
22.81 |
| 2026-10-09 12:00 |
18:40:56.93 |
-05:24:44.5 |
HIP 91738 |
22.78 |
| 2026-10-10 00:00 |
18:40:57.23 |
-05:24:57.6 |
HIP 91738 |
22.75 |
| 2026-10-10 12:00 |
18:40:57.55 |
-05:25:10.7 |
HIP 91738 |
22.72 |
| 2026-10-11 00:00 |
18:40:57.90 |
-05:25:23.8 |
HIP 91738 |
22.68 |