메타데이터
| 항목 |
값 |
| Designation |
C/2002 Y1 (Juels-Holvorcem) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-04-13T05:57:14.526720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:25Z |
| Obs used |
760 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
16.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-02-10.0000000 |
| e |
0.99715189 |
| q (au) |
0.713810 |
| a (au) |
250.625452 |
| i (deg) |
103.781543 |
| Ω (om, deg) |
166.220096 |
| ω (w, deg) |
128.815568 |
| M (ma, deg) |
359.984537 |
밝기
산란 + 전체 선형
$$
M_a = (6.760 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.760 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2002-01-12 |
2003-01-11 |
-33.2594 |
+10.778 |
| 2003-01-11 |
2003-04-12 |
+5.2439 |
+0.172 |
| 2003-04-13 |
2004-01-23 |
-2.2806 |
-1.257 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
10:09:48.32 |
-57:20:55.9 |
HIP 49840 |
7.56 |
| 2026-09-20 12:00 |
10:09:52.39 |
-57:21:16.5 |
HIP 49840 |
7.32 |
| 2026-09-21 00:00 |
10:09:56.44 |
-57:21:37.2 |
HIP 49840 |
7.14 |
| 2026-09-21 12:00 |
10:10:00.47 |
-57:21:58.2 |
HIP 49840 |
7.01 |
| 2026-09-22 00:00 |
10:10:04.49 |
-57:22:19.5 |
HIP 49840 |
6.95 |
| 2026-09-22 12:00 |
10:10:08.49 |
-57:22:41.0 |
HIP 49840 |
6.95 |
| 2026-09-23 00:00 |
10:10:12.47 |
-57:23:02.8 |
HIP 49840 |
7.02 |
| 2026-09-23 12:00 |
10:10:16.43 |
-57:23:24.8 |
HIP 49840 |
7.15 |
| 2026-09-24 00:00 |
10:10:20.38 |
-57:23:47.0 |
HIP 49840 |
7.34 |
| 2026-09-24 12:00 |
10:10:24.30 |
-57:24:09.5 |
HIP 49840 |
7.59 |
| 2026-09-25 00:00 |
10:10:28.21 |
-57:24:32.2 |
HIP 49840 |
7.89 |
| 2026-09-25 12:00 |
10:10:32.10 |
-57:24:55.1 |
HIP 49840 |
8.23 |
| 2026-09-26 00:00 |
10:10:35.97 |
-57:25:18.3 |
HIP 49840 |
8.61 |
| 2026-09-26 12:00 |
10:10:39.82 |
-57:25:41.7 |
HIP 49840 |
9.02 |
| 2026-09-27 00:00 |
10:10:43.65 |
-57:26:05.3 |
HIP 49840 |
9.47 |
| 2026-09-27 12:00 |
10:10:47.45 |
-57:26:29.2 |
HIP 49840 |
9.94 |
| 2026-09-28 00:00 |
10:10:51.24 |
-57:26:53.3 |
HIP 49840 |
10.43 |
| 2026-09-28 12:00 |
10:10:55.01 |
-57:27:17.6 |
HIP 49840 |
10.94 |
| 2026-09-29 00:00 |
10:10:58.76 |
-57:27:42.2 |
HIP 49840 |
11.47 |
| 2026-09-29 12:00 |
10:11:02.48 |
-57:28:07.0 |
HIP 49840 |
12.02 |
| 2026-09-30 00:00 |
10:11:06.19 |
-57:28:32.0 |
HIP 49840 |
12.57 |
| 2026-09-30 12:00 |
10:11:09.87 |
-57:28:57.2 |
HIP 49840 |
13.14 |
| 2026-10-01 00:00 |
10:11:13.53 |
-57:29:22.6 |
HIP 49840 |
13.72 |
| 2026-10-01 12:00 |
10:11:17.17 |
-57:29:48.3 |
HIP 49840 |
14.30 |
| 2026-10-02 00:00 |
10:11:20.78 |
-57:30:14.2 |
HIP 49840 |
14.89 |
| 2026-10-02 12:00 |
10:11:24.37 |
-57:30:40.3 |
HIP 49840 |
15.49 |
| 2026-10-03 00:00 |
10:11:27.94 |
-57:31:06.6 |
HIP 49840 |
16.10 |
| 2026-10-03 12:00 |
10:11:31.49 |
-57:31:33.1 |
HIP 49840 |
16.71 |
| 2026-10-04 00:00 |
10:11:35.01 |
-57:31:59.8 |
HIP 49840 |
17.32 |
| 2026-10-04 12:00 |
10:11:38.51 |
-57:32:26.8 |
HIP 49840 |
17.94 |
| 2026-10-05 00:00 |
10:11:41.99 |
-57:32:53.9 |
HIP 49840 |
18.56 |
| 2026-10-05 12:00 |
10:11:45.44 |
-57:33:21.3 |
HIP 49840 |
19.19 |
| 2026-10-06 00:00 |
10:11:48.87 |
-57:33:48.8 |
HIP 49840 |
19.81 |
| 2026-10-06 12:00 |
10:11:52.27 |
-57:34:16.6 |
HIP 49840 |
20.44 |
| 2026-10-07 00:00 |
10:11:55.64 |
-57:34:44.5 |
HIP 49840 |
21.08 |
| 2026-10-07 12:00 |
10:11:59.00 |
-57:35:12.7 |
HIP 49840 |
21.71 |
| 2026-10-08 00:00 |
10:12:02.32 |
-57:35:41.0 |
HIP 49840 |
22.35 |
| 2026-10-08 12:00 |
10:12:05.62 |
-57:36:09.6 |
HIP 49840 |
22.99 |
| 2026-10-09 00:00 |
10:12:08.89 |
-57:36:38.3 |
HIP 49840 |
23.63 |
| 2026-10-09 12:00 |
10:12:12.14 |
-57:37:07.3 |
HIP 49840 |
24.27 |
| 2026-10-10 00:00 |
10:12:15.36 |
-57:37:36.4 |
HIP 49840 |
24.91 |
| 2026-10-10 12:00 |
10:12:18.55 |
-57:38:05.7 |
HIP 49840 |
25.55 |
| 2026-10-11 00:00 |
10:12:21.71 |
-57:38:35.2 |
HIP 49907 |
25.34 |