C/2000 W1 (Utsunomiya-Jones)
메타데이터
| 항목 |
값 |
| Designation |
C/2000 W1 (Utsunomiya-Jones) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-12-26T13:25:20.971200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
440 |
| NEO |
- |
| M1 |
12.600 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-12-11.0000000 |
| e |
1.00000177 |
| q (au) |
0.321181 |
| a (au) |
-181492.894591 |
| i (deg) |
160.165435 |
| Ω (om, deg) |
10.765960 |
| ω (w, deg) |
51.508868 |
| M (ma, deg) |
-0.000000 |
밝기
산란 + 전체 선형
$$
M_a = (11.558 + 3.641\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.558 |
| n |
3.641 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.978 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2000-11-18 |
2000-11-30 |
-31.0615 |
-1.440 |
| 2000-11-30 |
2000-12-24 |
+5.5320 |
+1.050 |
| 2000-12-28 |
2001-04-26 |
-1.8686 |
+0.093 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
09:51:57.79 |
-01:20:16.0 |
HIP 48267 |
24.00 |
| 2026-02-03 12:00 |
09:51:55.38 |
-01:20:05.6 |
HIP 48267 |
23.45 |
| 2026-02-04 00:00 |
09:51:52.97 |
-01:19:55.1 |
HIP 48267 |
22.90 |
| 2026-02-04 12:00 |
09:51:50.55 |
-01:19:44.5 |
HIP 48267 |
22.36 |
| 2026-02-05 00:00 |
09:51:48.13 |
-01:19:33.8 |
HIP 48267 |
21.82 |
| 2026-02-05 12:00 |
09:51:45.71 |
-01:19:23.0 |
HIP 48267 |
21.28 |
| 2026-02-06 00:00 |
09:51:43.28 |
-01:19:12.0 |
HIP 48267 |
20.76 |
| 2026-02-06 12:00 |
09:51:40.85 |
-01:19:01.0 |
HIP 48267 |
20.23 |
| 2026-02-07 00:00 |
09:51:38.42 |
-01:18:49.9 |
HIP 48267 |
19.72 |
| 2026-02-07 12:00 |
09:51:35.98 |
-01:18:38.7 |
HIP 48267 |
19.21 |
| 2026-02-08 00:00 |
09:51:33.54 |
-01:18:27.4 |
HIP 48267 |
18.70 |
| 2026-02-08 12:00 |
09:51:31.10 |
-01:18:16.0 |
HIP 48267 |
18.21 |
| 2026-02-09 00:00 |
09:51:28.65 |
-01:18:04.5 |
HIP 48267 |
17.73 |
| 2026-02-09 12:00 |
09:51:26.21 |
-01:17:52.9 |
HIP 48267 |
17.25 |
| 2026-02-10 00:00 |
09:51:23.76 |
-01:17:41.2 |
HIP 48267 |
16.79 |
| 2026-02-10 12:00 |
09:51:21.31 |
-01:17:29.4 |
HIP 48267 |
16.34 |
| 2026-02-11 00:00 |
09:51:18.86 |
-01:17:17.5 |
HIP 48267 |
15.91 |
| 2026-02-11 12:00 |
09:51:16.40 |
-01:17:05.6 |
HIP 48267 |
15.49 |
| 2026-02-12 00:00 |
09:51:13.95 |
-01:16:53.5 |
HIP 48267 |
15.08 |
| 2026-02-12 12:00 |
09:51:11.49 |
-01:16:41.4 |
HIP 48267 |
14.69 |
| 2026-02-13 00:00 |
09:51:09.03 |
-01:16:29.1 |
HIP 48267 |
14.33 |
| 2026-02-13 12:00 |
09:51:06.58 |
-01:16:16.8 |
HIP 48267 |
13.98 |
| 2026-02-14 00:00 |
09:51:04.12 |
-01:16:04.4 |
HIP 48267 |
13.66 |
| 2026-02-14 12:00 |
09:51:01.66 |
-01:15:52.0 |
HIP 48267 |
13.36 |
| 2026-02-15 00:00 |
09:50:59.20 |
-01:15:39.4 |
HIP 48267 |
13.09 |
| 2026-02-15 12:00 |
09:50:56.75 |
-01:15:26.7 |
HIP 48267 |
12.84 |
| 2026-02-16 00:00 |
09:50:54.29 |
-01:15:14.0 |
HIP 48267 |
12.63 |
| 2026-02-16 12:00 |
09:50:51.83 |
-01:15:01.2 |
HIP 48267 |
12.45 |
| 2026-02-17 00:00 |
09:50:49.38 |
-01:14:48.3 |
HIP 48267 |
12.30 |
| 2026-02-17 12:00 |
09:50:46.92 |
-01:14:35.3 |
HIP 48267 |
12.18 |
| 2026-02-18 00:00 |
09:50:44.47 |
-01:14:22.3 |
HIP 48267 |
12.10 |
| 2026-02-18 12:00 |
09:50:42.02 |
-01:14:09.2 |
HIP 48267 |
12.06 |
| 2026-02-19 00:00 |
09:50:39.57 |
-01:13:56.0 |
HIP 48267 |
12.05 |
| 2026-02-19 12:00 |
09:50:37.12 |
-01:13:42.7 |
HIP 48267 |
12.08 |
| 2026-02-20 00:00 |
09:50:34.67 |
-01:13:29.4 |
HIP 48267 |
12.14 |
| 2026-02-20 12:00 |
09:50:32.23 |
-01:13:16.0 |
HIP 48267 |
12.24 |
| 2026-02-21 00:00 |
09:50:29.79 |
-01:13:02.5 |
HIP 48267 |
12.38 |
| 2026-02-21 12:00 |
09:50:27.35 |
-01:12:49.0 |
HIP 48267 |
12.55 |
| 2026-02-22 00:00 |
09:50:24.91 |
-01:12:35.3 |
HIP 48267 |
12.75 |
| 2026-02-22 12:00 |
09:50:22.48 |
-01:12:21.7 |
HIP 48267 |
12.98 |
| 2026-02-23 00:00 |
09:50:20.05 |
-01:12:07.9 |
HIP 48267 |
13.24 |
| 2026-02-23 12:00 |
09:50:17.62 |
-01:11:54.1 |
HIP 48267 |
13.52 |
| 2026-02-24 00:00 |
09:50:15.20 |
-01:11:40.3 |
HIP 48267 |
13.84 |