메타데이터
| 항목 |
값 |
| Designation |
C/1997 T1 (Utsunomiya) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1997-12-10T03:28:30.063360Z |
| Orbit solution date (soln_date, UTC) |
2022-02-03T20:42:52Z |
| Obs used |
681 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
18.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1997-11-20.0000000 |
| e |
0.99851974 |
| q (au) |
1.359109 |
| a (au) |
918.157376 |
| i (deg) |
127.992638 |
| Ω (om, deg) |
53.702748 |
| ω (w, deg) |
95.965142 |
| M (ma, deg) |
359.999286 |
밝기
산란 + 전체 선형
$$
M_a = (6.692 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.692 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
09:24:34.48 |
-39:10:01.4 |
HIP 46124 |
4.73 |
| 2026-05-12 12:00 |
09:24:34.48 |
-39:09:33.0 |
HIP 46124 |
4.33 |
| 2026-05-13 00:00 |
09:24:34.51 |
-39:09:04.7 |
HIP 46124 |
3.95 |
| 2026-05-13 12:00 |
09:24:34.56 |
-39:08:36.5 |
HIP 46124 |
3.60 |
| 2026-05-14 00:00 |
09:24:34.63 |
-39:08:08.4 |
HIP 46124 |
3.28 |
| 2026-05-14 12:00 |
09:24:34.73 |
-39:07:40.3 |
HIP 46124 |
3.00 |
| 2026-05-15 00:00 |
09:24:34.85 |
-39:07:12.3 |
HIP 46124 |
2.79 |
| 2026-05-15 12:00 |
09:24:34.99 |
-39:06:44.4 |
HIP 46124 |
2.64 |
| 2026-05-16 00:00 |
09:24:35.16 |
-39:06:16.6 |
HIP 46124 |
2.58 |
| 2026-05-16 12:00 |
09:24:35.36 |
-39:05:48.8 |
HIP 46124 |
2.60 |
| 2026-05-17 00:00 |
09:24:35.58 |
-39:05:21.2 |
HIP 46124 |
2.71 |
| 2026-05-17 12:00 |
09:24:35.82 |
-39:04:53.6 |
HIP 46124 |
2.89 |
| 2026-05-18 00:00 |
09:24:36.09 |
-39:04:26.1 |
HIP 46124 |
3.14 |
| 2026-05-18 12:00 |
09:24:36.37 |
-39:03:58.8 |
HIP 46124 |
3.43 |
| 2026-05-19 00:00 |
09:24:36.69 |
-39:03:31.5 |
HIP 46124 |
3.76 |
| 2026-05-19 12:00 |
09:24:37.03 |
-39:03:04.3 |
HIP 46124 |
4.11 |
| 2026-05-20 00:00 |
09:24:37.39 |
-39:02:37.2 |
HIP 46124 |
4.49 |
| 2026-05-20 12:00 |
09:24:37.77 |
-39:02:10.3 |
HIP 46124 |
4.88 |
| 2026-05-21 00:00 |
09:24:38.18 |
-39:01:43.4 |
HIP 46124 |
5.28 |
| 2026-05-21 12:00 |
09:24:38.61 |
-39:01:16.6 |
HIP 46124 |
5.69 |
| 2026-05-22 00:00 |
09:24:39.07 |
-39:00:50.0 |
HIP 46124 |
6.11 |
| 2026-05-22 12:00 |
09:24:39.55 |
-39:00:23.4 |
HIP 46124 |
6.54 |
| 2026-05-23 00:00 |
09:24:40.05 |
-38:59:57.0 |
HIP 46124 |
6.96 |
| 2026-05-23 12:00 |
09:24:40.57 |
-38:59:30.7 |
HIP 46124 |
7.40 |
| 2026-05-24 00:00 |
09:24:41.12 |
-38:59:04.4 |
HIP 46124 |
7.83 |
| 2026-05-24 12:00 |
09:24:41.69 |
-38:58:38.4 |
HIP 46124 |
8.27 |
| 2026-05-25 00:00 |
09:24:42.28 |
-38:58:12.4 |
HIP 46124 |
8.70 |
| 2026-05-25 12:00 |
09:24:42.90 |
-38:57:46.5 |
HIP 46129 |
9.01 |
| 2026-05-26 00:00 |
09:24:43.54 |
-38:57:20.8 |
HIP 46129 |
8.66 |
| 2026-05-26 12:00 |
09:24:44.20 |
-38:56:55.2 |
HIP 46129 |
8.33 |
| 2026-05-27 00:00 |
09:24:44.89 |
-38:56:29.7 |
HIP 46129 |
8.01 |
| 2026-05-27 12:00 |
09:24:45.59 |
-38:56:04.4 |
HIP 46129 |
7.71 |
| 2026-05-28 00:00 |
09:24:46.32 |
-38:55:39.1 |
HIP 46129 |
7.43 |
| 2026-05-28 12:00 |
09:24:47.07 |
-38:55:14.0 |
HIP 46129 |
7.17 |
| 2026-05-29 00:00 |
09:24:47.85 |
-38:54:49.1 |
HIP 46129 |
6.94 |
| 2026-05-29 12:00 |
09:24:48.64 |
-38:54:24.2 |
HIP 46129 |
6.72 |
| 2026-05-30 00:00 |
09:24:49.46 |
-38:53:59.5 |
HIP 46129 |
6.54 |
| 2026-05-30 12:00 |
09:24:50.30 |
-38:53:35.0 |
HIP 46129 |
6.39 |
| 2026-05-31 00:00 |
09:24:51.16 |
-38:53:10.5 |
HIP 46129 |
6.26 |
| 2026-05-31 12:00 |
09:24:52.05 |
-38:52:46.2 |
HIP 46129 |
6.18 |
| 2026-06-01 00:00 |
09:24:52.95 |
-38:52:22.1 |
HIP 46129 |
6.12 |
| 2026-06-01 12:00 |
09:24:53.88 |
-38:51:58.1 |
HIP 46129 |
6.11 |
| 2026-06-02 00:00 |
09:24:54.83 |
-38:51:34.2 |
HIP 46129 |
6.13 |