메타데이터
| 항목 |
값 |
| Designation |
C/1968 L1 (Whitaker-Thomas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1968-06-04T12:06:59.990400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
23 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1968-07-02.0000000 |
| e |
1.00000000 |
| q (au) |
1.234006 |
| a (au) |
- |
| i (deg) |
61.767368 |
| Ω (om, deg) |
254.716109 |
| ω (w, deg) |
353.977969 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (9.895 + 3.317\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.895 |
| n |
3.317 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
03:59:24.48 |
+38:30:08.7 |
HIP 18657 |
19.32 |
| 2026-09-20 12:00 |
03:59:23.72 |
+38:30:12.5 |
HIP 18657 |
19.28 |
| 2026-09-21 00:00 |
03:59:22.95 |
+38:30:16.3 |
HIP 18657 |
19.24 |
| 2026-09-21 12:00 |
03:59:22.17 |
+38:30:20.0 |
HIP 18657 |
19.21 |
| 2026-09-22 00:00 |
03:59:21.37 |
+38:30:23.7 |
HIP 18657 |
19.18 |
| 2026-09-22 12:00 |
03:59:20.56 |
+38:30:27.3 |
HIP 18657 |
19.15 |
| 2026-09-23 00:00 |
03:59:19.73 |
+38:30:30.8 |
HIP 18657 |
19.12 |
| 2026-09-23 12:00 |
03:59:18.89 |
+38:30:34.3 |
HIP 18657 |
19.10 |
| 2026-09-24 00:00 |
03:59:18.04 |
+38:30:37.7 |
HIP 18657 |
19.08 |
| 2026-09-24 12:00 |
03:59:17.18 |
+38:30:41.1 |
HIP 18657 |
19.07 |
| 2026-09-25 00:00 |
03:59:16.30 |
+38:30:44.4 |
HIP 18657 |
19.05 |
| 2026-09-25 12:00 |
03:59:15.41 |
+38:30:47.7 |
HIP 18657 |
19.04 |
| 2026-09-26 00:00 |
03:59:14.50 |
+38:30:50.9 |
HIP 18657 |
19.04 |
| 2026-09-26 12:00 |
03:59:13.58 |
+38:30:54.0 |
HIP 18657 |
19.03 |
| 2026-09-27 00:00 |
03:59:12.65 |
+38:30:57.1 |
HIP 18657 |
19.03 |
| 2026-09-27 12:00 |
03:59:11.70 |
+38:31:00.1 |
HIP 18657 |
19.04 |
| 2026-09-28 00:00 |
03:59:10.75 |
+38:31:03.1 |
HIP 18657 |
19.05 |
| 2026-09-28 12:00 |
03:59:09.77 |
+38:31:06.0 |
HIP 18657 |
19.06 |
| 2026-09-29 00:00 |
03:59:08.79 |
+38:31:08.8 |
HIP 18657 |
19.07 |
| 2026-09-29 12:00 |
03:59:07.79 |
+38:31:11.6 |
HIP 18657 |
19.09 |
| 2026-09-30 00:00 |
03:59:06.78 |
+38:31:14.3 |
HIP 18657 |
19.12 |
| 2026-09-30 12:00 |
03:59:05.76 |
+38:31:17.0 |
HIP 18657 |
19.14 |
| 2026-10-01 00:00 |
03:59:04.73 |
+38:31:19.6 |
HIP 18657 |
19.17 |
| 2026-10-01 12:00 |
03:59:03.68 |
+38:31:22.1 |
HIP 18657 |
19.21 |
| 2026-10-02 00:00 |
03:59:02.62 |
+38:31:24.6 |
HIP 18657 |
19.25 |
| 2026-10-02 12:00 |
03:59:01.55 |
+38:31:27.0 |
HIP 18657 |
19.29 |
| 2026-10-03 00:00 |
03:59:00.46 |
+38:31:29.4 |
HIP 18657 |
19.34 |
| 2026-10-03 12:00 |
03:58:59.36 |
+38:31:31.7 |
HIP 18657 |
19.39 |
| 2026-10-04 00:00 |
03:58:58.25 |
+38:31:33.9 |
HIP 18657 |
19.45 |
| 2026-10-04 12:00 |
03:58:57.13 |
+38:31:36.0 |
HIP 18657 |
19.51 |
| 2026-10-05 00:00 |
03:58:56.00 |
+38:31:38.1 |
HIP 18565 |
19.50 |
| 2026-10-05 12:00 |
03:58:54.85 |
+38:31:40.2 |
HIP 18565 |
19.41 |
| 2026-10-06 00:00 |
03:58:53.69 |
+38:31:42.2 |
HIP 18565 |
19.32 |
| 2026-10-06 12:00 |
03:58:52.52 |
+38:31:44.1 |
HIP 18565 |
19.24 |
| 2026-10-07 00:00 |
03:58:51.34 |
+38:31:45.9 |
HIP 18565 |
19.15 |
| 2026-10-07 12:00 |
03:58:50.14 |
+38:31:47.7 |
HIP 18565 |
19.07 |
| 2026-10-08 00:00 |
03:58:48.94 |
+38:31:49.4 |
HIP 18565 |
19.00 |
| 2026-10-08 12:00 |
03:58:47.72 |
+38:31:51.0 |
HIP 18565 |
18.92 |
| 2026-10-09 00:00 |
03:58:46.49 |
+38:31:52.6 |
HIP 18565 |
18.85 |
| 2026-10-09 12:00 |
03:58:45.25 |
+38:31:54.1 |
HIP 18565 |
18.78 |
| 2026-10-10 00:00 |
03:58:44.00 |
+38:31:55.6 |
HIP 18565 |
18.72 |
| 2026-10-10 12:00 |
03:58:42.74 |
+38:31:57.0 |
HIP 18565 |
18.66 |
| 2026-10-11 00:00 |
03:58:41.46 |
+38:31:58.3 |
HIP 18565 |
18.61 |